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Full list of Palindromic Triangulars
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 PLAIN TEXT POLYGONS 

The Table


Index NrInfo BasenumberLength
Palindromic Triangular NumberLength
   
[PG3] Formula = n(n+1)/2
195
H83		Info 11.604.355.897.766.717.137.264.209.814.75132
67.330.537.901.016.595.837.936.819.195.144.159.191.863.973.859.561.010.973.503.37662
194Info 11.551.324.884.361.124.513.629.290.544.18832
66.716.553.292.030.273.308.573.626.471.522.517.462.637.580.337.203.029.235.561.76662
193Info 11.425.320.268.440.457.835.417.867.182.49632
65.268.971.618.218.167.746.296.167.721.899.812.776.169.264.776.181.281.617.986.25662
192Info 7.864.314.421.857.712.727.542.017.000.68231
30.923.720.662.919.605.193.151.763.743.388.334.736.715.139.150.691.926.602.732.90362
191
H82		Info 5.956.055.302.210.614.567.120.330.592.49331
17.737.297.381.495.587.611.197.659.145.355.354.195.679.111.678.559.418.379.273.77162
190Info 5.783.475.877.417.359.746.201.161.921.35831
16.724.296.612.334.249.588.772.356.940.422.404.965.327.788.594.243.321.669.242.76162
189
H81		Info Prime!    5.510.313.150.359.237.826.498.809.954.77331
15.181.775.507.510.974.169.398.336.861.133.116.863.389.396.147.901.570.557.718.15162
188Info 3.488.109.207.628.045.100.943.025.672.42831
6.083.452.922.169.774.323.707.832.554.844.484.552.387.073.234.779.612.292.543.80661
187Info 2.649.878.227.057.025.949.437.140.416.14231
3.510.927.309.115.443.586.289.107.273.332.333.727.019.826.853.445.119.037.290.15361
186Info 1.782.781.186.350.933.790.009.742.990.09831
1.589.154.379.203.421.456.422.621.821.928.291.281.262.246.541.243.029.734.519.85161
185Info 1.523.763.959.995.218.243.970.890.589.66631
1.160.928.302.890.154.532.497.341.802.232.322.081.437.942.354.510.982.038.290.61161
184Info 344.598.058.975.690.735.641.865.358.69030
59.373.911.124.906.815.186.764.391.910.901.919.346.768.151.860.942.111.937.39559
183
H80		Info 332.687.791.755.510.481.729.984.663.48530
55.340.583.391.578.954.029.492.500.160.806.100.529.492.045.987.519.338.504.35559
182Info 83.852.501.297.050.811.722.296.086.14229
3.515.620.986.885.954.031.114.236.657.997.566.324.111.304.595.886.890.265.15358
181
H79		Info 61.861.419.564.584.047.527.727.330.61329
1.913.417.615.272.750.984.206.227.878.228.787.226.024.890.572.725.167.143.19158
180Info 36.097.712.499.280.391.828.621.137.09629
651.522.423.840.351.916.117.173.996.292.699.371.711.619.153.048.324.225.15657
179
H78		Info 32.972.288.624.426.519.581.946.337.40929
543.585.908.566.243.233.447.813.416.222.614.318.744.332.342.665.809.585.34557
178Info 26.703.535.701.134.165.007.419.065.38229
356.539.409.470.873.460.765.948.942.434.249.849.567.064.378.074.904.935.65357
177
H77		Info 19.232.217.442.397.011.118.856.549.52129
184.939.093.875.819.915.846.819.675.717.576.918.648.519.918.578.390.939.48157
176
H76		Info 4.171.522.634.325.685.120.423.923.18728
8.700.800.544.345.751.829.458.446.650.566.448.549.281.575.434.450.080.07855
175Info 3.479.635.046.544.710.084.611.458.99628
6.053.930.028.571.103.358.472.012.555.552.102.748.533.011.758.200.393.50655
174Info 1.712.322.112.672.987.930.004.654.68628
1.466.023.508.774.442.385.882.534.859.584.352.885.832.444.778.053.206.64155
173
H75		Info 1.694.934.457.715.605.943.771.327.51328
1.436.401.407.975.847.596.488.073.464.643.708.846.957.485.797.041.046.34155
172
H74		Info 1.608.843.601.060.583.225.861.746.48128
1.294.188.866.336.792.535.757.443.701.073.447.575.352.976.336.688.814.92155
171Info 778.304.443.341.202.475.722.787.76227
302.878.903.262.329.527.375.854.916.619.458.573.725.923.262.309.878.20354
170
H73		Info 527.704.544.889.979.086.555.637.82127
139.236.043.348.769.976.436.410.774.477.014.634.679.967.843.340.632.93154
169
H72		Info Prime!    464.762.829.353.941.815.880.187.20127
108.002.243.774.540.620.212.510.333.333.015.212.026.045.477.342.200.80154
168
H71		Info 317.588.942.343.943.926.619.604.58527
50.431.368.149.572.469.821.594.569.096.549.512.896.427.594.186.313.40553
167
H70		Info 194.997.423.092.985.883.324.586.01327
19.011.997.506.452.472.127.996.132.423.169.972.127.425.460.579.911.09153
166
H69		Info 193.338.224.725.418.777.596.313.55327
18.689.834.569.988.266.379.838.452.825.483.897.366.288.996.543.898.68153
165Info 173.886.091.636.007.644.064.387.22627
15.118.186.432.223.023.774.728.508.780.582.747.732.032.223.468.181.15153
164Info 62.665.727.903.192.949.362.246.73826
1.963.496.726.818.507.700.938.130.110.318.390.077.058.186.276.943.69152
163Info 47.790.468.351.311.396.682.904.86626
1.141.964.432.618.848.122.919.519.889.159.192.218.488.162.344.691.41152
162Info 34.925.848.025.358.339.344.648.59626
609.907.430.145.213.505.805.139.181.931.508.505.312.541.034.709.90651
161
H68		Info 34.570.045.466.623.693.915.618.36526
597.544.021.782.214.705.597.988.959.889.795.507.412.287.120.445.79551
160
H67		Info 16.113.599.345.002.654.884.269.39326
129.824.041.925.634.994.253.924.353.429.352.499.436.529.140.428.92151
159Info 4.063.560.947.310.268.109.225.79225
8.256.263.786.252.561.776.297.593.957.926.771.652.526.873.626.52849
158Info 4.052.563.875.295.474.515.566.67225
8.211.636.981.674.937.160.312.274.722.130.617.394.761.896.361.12849
157Info 3.283.130.995.819.972.903.686.35425
5.389.474.567.856.923.467.988.997.998.897.643.296.587.654.749.83549
156
H66		Info 3.281.940.831.768.274.049.845.64525
5.385.567.811.613.915.254.381.275.721.834.525.193.161.187.655.83549
155Info 2.669.765.477.898.748.990.170.34225
3.563.823.853.489.967.791.349.267.629.431.977.699.843.583.283.65349
154
H65		Info 1.972.088.846.281.593.888.294.41325
1.944.567.208.814.134.024.246.830.386.424.204.314.188.027.654.49149
153Info 1.920.508.288.374.901.008.727.64625
1.844.176.042.858.345.966.511.280.821.156.695.438.582.406.714.48149
152Info 1.535.048.277.308.111.618.202.05825
1.178.186.606.833.300.573.192.218.122.913.750.033.386.066.818.71149
151
H64		Info 1.425.999.292.822.499.645.424.47325
1.016.736.991.565.134.544.383.803.083.834.454.315.651.996.376.10149
150Info 128.184.152.897.963.669.861.55224
8.215.588.527.084.263.951.180.440.811.593.624.807.258.855.12846
149Info 115.945.380.367.510.626.966.64824
6.721.665.614.283.359.365.218.338.125.639.533.824.165.661.27646
148Info 114.860.741.505.066.911.342.29624
6.596.494.969.546.900.318.903.773.098.130.096.459.694.946.95646
147
H63		Info 26.539.182.748.774.333.465.49723
352.164.110.486.420.593.101.030.101.395.024.684.011.461.25345
146
H62		Info 24.864.166.542.722.584.070.75723
309.113.388.932.122.569.558.171.855.965.221.239.883.311.90345
145Info 14.170.433.757.425.168.663.99823
100.400.596.436.787.391.913.333.319.193.787.634.695.004.00145
144
H61		Info 5.805.651.147.054.009.150.04122
16.852.792.620.644.766.088.388.388.066.744.602.629.725.86144
143Info 3.630.238.456.595.636.157.72822
6.589.315.625.872.933.253.747.473.523.392.785.265.139.85643
142Info 3.261.059.106.801.402.665.75422
5.317.253.249.026.181.079.052.509.701.816.209.423.527.13543
141Info 775.781.766.082.836.455.60221
300.918.674.293.302.389.819.918.983.203.392.476.819.00342
140Info 585.863.634.063.453.017.10621
171.618.098.859.017.793.192.291.397.710.958.890.816.17142
139Info 333.741.662.509.416.495.21021
55.691.748.647.274.629.891.519.892.647.274.684.719.65541
138
H60		Info 333.470.345.690.102.634.08521
55.601.235.727.338.276.212.021.267.283.372.753.210.65541
137
H59		Info 191.600.462.227.318.472.12121
18.355.368.562.861.046.305.450.364.016.826.586.355.38141
136
H58		Info 35.369.824.079.822.102.85120
625.512.227.718.781.732.353.237.187.817.722.215.52639
135Info 32.637.734.114.649.927.57020
532.610.844.069.291.845.737.548.192.960.448.016.23539
134
H57		Info 19.123.354.745.855.372.72120
182.851.348.367.914.603.505.306.419.763.843.158.28139
133Info 16.175.904.024.612.952.34620
130.829.935.506.744.754.616.457.447.605.539.928.03139
132Info 11.665.833.272.979.576.31620
68.045.832.976.478.686.977.968.687.467.923.854.08638
131
H56		Info 3.654.345.456.545.434.56319
6.677.120.357.887.130.286.820.317.887.530.217.76637
130Info 3.652.242.206.567.626.03619
6.669.436.567.716.980.985.890.896.177.656.349.66637
129Info 3.637.582.781.740.258.58819
6.616.004.247.006.598.875.788.956.007.424.006.16637
128Info 3.405.603.489.389.985.67419
5.799.067.563.472.623.134.313.262.743.657.609.97537
127
H55		Info 3.333.229.904.907.177.88519
5.555.210.799.483.757.064.607.573.849.970.125.55537
126Info 3.271.889.143.987.456.17019
5.352.629.285.271.484.348.434.841.725.829.262.53537
125Info 3.237.532.871.306.389.77419
5.240.809.546.394.698.286.828.964.936.459.080.42537
124Info 2.672.899.778.869.085.02219
3.572.196.613.939.201.806.081.029.393.166.912.75337
123Info 2.470.152.923.949.718.92219
3.050.827.733.848.672.937.392.768.483.377.280.50337
122
H54		Info 1.935.755.375.665.009.72119
1.873.574.437.207.991.455.541.997.027.344.753.78137
121Info 775.527.779.120.670.32218
300.721.668.093.919.607.706.919.390.866.127.00336
120Info 352.465.914.177.746.74818
62.116.110.328.577.368.186.377.582.301.161.12635
119Info 352.449.681.516.778.87618
62.110.389.000.639.430.803.493.600.098.301.12635
118
H53		Info 247.184.344.095.525.79718
30.550.049.982.967.649.594.676.928.994.005.50335
117
H52		Info 112.540.786.741.633.18318
6.332.714.340.212.879.669.782.120.434.172.33634
116
H51		Info 109.113.947.229.482.90918
5.952.926.739.999.190.550.919.999.376.292.59534
115
H50		Info 108.100.203.429.839.92918
5.842.826.990.786.388.228.836.870.996.282.48534
114
H49		Info 78.358.935.395.500.83717
3.070.061.378.158.136.996.318.518.731.600.70334
113
H48		Info 26.555.908.318.527.49717
352.608.133.311.018.969.810.113.331.806.25333
112Info 10.686.132.500.837.47417
57.096.713.912.727.488.472.721.931.769.07532
111
H47		Info 4.500.990.532.341.40116
10.129.457.886.113.466.431.168.875.492.10132
110Info 4.062.262.265.478.59216
8.250.987.356.765.633.365.676.537.890.52831
109
H46		Info 3.729.035.890.325.94316
6.952.854.335.669.501.059.665.334.582.59631
108
H45		Info 3.249.909.720.631.02516
5.280.956.596.126.015.106.216.956.590.82531
107Info 362.785.412.063.72815
65.806.627.603.124.642.130.672.660.85629
106
H44		Info 353.520.620.692.92315
62.488.414.627.554.945.572.641.488.42629
105
H43		Info 326.825.312.860.02915
53.407.392.563.028.082.036.529.370.43529
104Info 173.008.538.941.23815
14.965.977.273.291.019.237.277.956.94129
103
H42		Info 164.402.190.438.22115
13.514.040.110.442.624.401.104.041.53129
102Info 109.237.730.189.29015
5.966.440.848.454.114.548.480.446.69528
101
H41		Info 50.364.608.806.28114
1.268.296.910.104.884.010.196.928.62128
100Info 41.801.907.377.57214
873.699.730.201.575.102.037.996.37827
99Info 36.543.454.565.43614
667.712.035.788.060.887.530.217.76627
98Info 26.515.516.477.98214
351.536.307.047.080.740.703.635.15327
97
H40		Info 11.423.905.837.87114
65.252.812.296.277.269.221.825.25626
96Info 10.865.723.925.03414
59.031.978.207.533.570.287.913.09526
95Info 7.747.137.817.12213
30.009.072.178.744.787.127.090.00326
94Info 5.052.120.436.31813
12.761.960.451.533.515.406.916.72126
93
H39		Info 4.063.286.017.96713
8.255.146.631.905.091.366.415.52825
92Info 2.466.444.446.64213
3.041.674.104.186.814.014.761.40325
91Info 1.325.269.593.37213
878.169.747.558.855.747.961.87824
90Info 529.670.494.28612
140.275.416.258.852.614.572.04124
89
H38		Info 417.898.160.42712
87.319.436.244.344.263.491.37823
88
H37		Info 405.270.333.72712
82.122.021.699.799.612.022.12823
87Info 353.922.263.87612
62.630.484.433.733.448.403.62623
86
H36		Info 352.469.793.25112
62.117.477.577.377.577.471.12623
85Info 266.444.444.66212
35.496.321.045.754.012.369.45323
84Info 246.644.446.64212
30.416.741.529.792.514.761.40323
83Info 104.561.417.19012
5.466.544.982.442.894.456.64522
82Info 62.747.896.73811
1.968.649.272.552.729.468.69122
81Info 49.786.655.91811
1.239.355.553.773.555.539.32122
80Info 36.657.342.04811
671.880.363.030.363.088.17621
79
H35		Info 26.694.925.65711
356.309.527.929.725.903.65321
78Info 26.644.444.66211
354.963.215.686.512.369.45321
77Info 24.888.030.68211
309.707.035.626.530.707.90321
76
H34		Info 17.527.740.90111
153.610.850.555.058.016.35121
75Info 14.667.896.19811
107.573.589.444.985.375.70121
74Info 11.151.642.87611
62.179.569.422.496.597.12620
73
H33		Info Prime Curios!    5.513.600.77310
15.199.896.744.769.899.15120
72
H32		Info 3.567.632.39110
6.364.000.440.440.004.63619
71Info 2.664.444.66210
3.549.632.679.762.369.45319
70
H31		Info 2.480.116.43710
3.075.488.771.778.845.70319
69
H30		Info 1.014.708.80510
514.816.979.979.618.41518
68Info 846.122.2229
357.961.407.704.169.75318
67
H29		Info 368.505.7519
67.898.244.444.289.87617
66
H28		Info 363.474.3639
66.056.806.460.865.06617
65
H27		Info 341.127.3459
58.183.932.923.938.18517
64
H26		Info 182.143.8419
16.588.189.498.188.56117
63Info 149.721.0589
11.208.197.679.180.21117
62Info 149.142.4589
11.121.736.463.712.11117
61Info 128.127.0329
8.208.268.228.628.02816
60Info 109.656.2289
6.012.244.224.422.10616
59Info 59.009.8188
1.741.079.339.701.47116
58Info 56.524.6988
1.597.520.770.257.95116
57
H25		Info 50.008.8818
1.250.444.114.440.52116
56Info 37.009.9168
684.866.959.668.48615
55Info 36.979.1088
683.727.232.727.38615
54Info 36.929.9088
681.909.070.909.18615
53Info 36.545.4368
667.784.464.487.76615
52
H24		Info 35.670.3918
636.188.414.881.63615
51
H23		Info 34.705.1718
602.224.464.422.20615
50Info 34.456.4348
593.622.939.226.39515
49Info 33.062.9348
546.578.818.875.64515
48Info 32.850.9708
539.593.131.395.93515
47Info 31.643.9108
500.668.535.866.00515
46Info 26.743.4228
357.605.323.506.75315
45Info 15.126.2588
114.401.848.104.41115
44Info 12.812.3928
82.078.700.787.02814
43Info 11.631.0488
67.640.644.604.67614
42
H22		Info 11.111.1118
61.728.399.382.71614
41Info 6.307.9387
19.895.044.059.89114
40
H21		Info 3.707.8837
6.874.200.024.78613
39Info 3.457.6347
5.977.618.167.79513
38
H20		Info 3.240.4257
5.250.178.710.52513
37
H19		Info 1.620.6217
1.313.207.023.13113
36Info 417.9726
87.350.505.37811
35Info 365.4366
66.771.917.76611
34Info 342.2706
58.574.547.58511
33Info 337.6506
57.003.930.07511
32Info 246.6426
30.416.261.40311
31Info 179.1586
16.048.884.06111
30
H18		Info 167.0536
13.953.435.93111
29
H17		Info 111.1116
6.172.882.71610
28
H16		Info 102.8496
5.289.009.82510
27Info 57.1665
1.634.004.36110
26
H15		Info 50.2815
1.264.114.62110
25Info 18.9065
178.727.8719
24Info 11.0885
61.477.4168
23Info 8.3824
35.133.1538
22Info 3.5484
6.295.9267
21
H14		Info 3.3694
5.676.7657
20
H13		Info 3.1854
5.073.7057
19Info 2.6624
3.544.4537
18
H12		Info 1.8334
1.680.8617
17
H11		Info 1.5934
1.269.6217
16
H10		Info 1.2874
828.8286
15
H9		Info 1.1114
617.7166
14
H8		Info 3633
66.0665
13
H7		Info Prime!    1733
15.0515
12Info 1323
8.7784
11
H6		Info Prime!    1093
5.9954
10
H5		Info 772
3.0034
9Info 362
6663
8Info 342
5953
7Info 182
1713
6
H4		Info Prime!    112
662
5Info 102
552
4
H3		Info Prime!    31
61
3Info Prime!    21
Prime!    31
2
H2		Info 11
11
1
H1		Info 01
01


Contributions

[ May 31, 2004 ]
PDG's search program reached the  basenumber 1,414,213,562,373,095,048,802. From length 43 Feng Yuan took over.
PT[151] > 447.213.595.499.957.939.281.835.

[ November 6, 2022 ]
David Griffeath (email) using Rust code from R. Xiao added nine more entries [151] up to [159].

[ November 9, 2022 ]
David Griffeath (email) using Rust code from R. Xiao added three more entries [160], [161] and [162].

[ November 21, 2022 ]
David Griffeath (email) using CUDApalin from R. Xiao added nine more entries from [163] up to [171].

[ December 6, 2022 ]
Robert Xiao (email) added two entries missed by Feng Yuan. See index nbrs [145] and [146].

[ June 14, 2023 ]
Patrick De Geest (email) using CUDApalin from R. Xiao added five more entries [172] up to [176].

[ June 26, 2023 ]
Patrick De Geest (email) using CUDApalin from R. Xiao added six more entries [177] up to [182].

[ September 7, 2023 ]
Patrick De Geest (email) using CUDApalin from R. Xiao added two more entries [183] and [184].

[ September 16, 2023 ]
Patrick De Geest (email) using CUDApalin from R. Xiao added four more entries [185] and [188].

[ September 22, 2023 ]
Patrick De Geest (email) using CUDApalin from R. Xiao added seven more entries [189] and [195], all of length 62.

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Patrick De Geest - Belgium flag - Short Bio - Some Pictures
E-mail address : pdg@worldofnumbers.com