World!Of Numbers |
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[ April 18, 2000 ] record Palindromic Triangular numbers [138] & [139]. They are the first ones discovered in this new millennium.
These beautiful palindromes have a staggering length of 41 digits ! | |||||||||||||
A000038 Prime Curios! Prime Puzzle Wikipedia 38 Le Nombre 38 Numberland 38 |
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