A375266 Irregular triangle read by rows in which row n lists the iterates of the A375265 map from n to 1.
1, 2, 1, 3, 1, 4, 2, 1, 5, 16, 8, 4, 2, 1, 6, 2, 1, 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1, 8, 4, 2, 1, 9, 3, 1, 10, 5, 16, 8, 4, 2, 1, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1, 12, 4, 2, 1, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1
Offset: 1
Examples
Triangle begins: 1; 2, 1; 3, 1; 4, 2, 1; 5, 16, 8, 4, 2, 1; 6, 2, 1; 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1; 8, 4, 2, 1; 9, 3, 1; 10, 5, 16, 8, 4, 2, 1; ...
Links
- Paolo Xausa, Table of n, a(n) for n = 1..12824 (rows 1..300 of the triangle, flattened).
- Index entries for sequences related to 3x+1 (or Collatz) problem.
Comments