A355708 Irregular triangle read by rows in which row n lists the possible periods for the iterations of the map sum of n-th powers of digits.
1, 1, 8, 1, 2, 3, 1, 2, 7, 1, 2, 4, 6, 10, 12, 22, 28, 1, 2, 3, 4, 10, 30, 1, 2, 3, 6, 12, 14, 21, 27, 30, 56, 92, 1, 25, 154, 1, 2, 3, 4, 8, 10, 19, 24, 28, 30, 80, 93, 1, 6, 7, 17, 81, 123
Offset: 1
Examples
Triangle begins: 1; 1, 8; 1, 2, 3; 1, 2, 7; 1, 2, 4, 6, 10, 12, 22, 28; 1, 2, 3, 4, 10, 30; 1, 2, 3, 6, 12, 14, 21, 27, 30, 56, 92; 1, 25, 154; 1, 2, 3, 4, 8, 10, 19, 24, 28, 30, 80, 93; 1, 6, 7, 17, 81, 123; ...
Links
- Eric Weisstein's World of Mathematics, Digitaddition