WON plate
165 |

[ May 30, 2005 ]
Giovanni Resta's's (email) amazing
Palindromic Circle.

While Giovanni was solving Rivera's Puzzle 311
he also solved this problem that may interest us.

Which is the minimal non-trivial N such that the numbers
from 1 to N can be disposed in a circle in such a way that
every couple of adjacent numbers has a palindromic sum ?

According to his computations, such number is
66 a palindrome itself !
and the disposition is depicted in the above picture.

A000165 Prime Curios! Prime Puzzle
Wikipedia 165 Le nombre 165


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