A226615 Length of the Collatz-like 3x+k cycle associated with A226614(n).

2, 3, 6, 4, 7, 5, 20, 11, 12, 28, 6, 38, 44, 48, 72, 18, 106, 29, 75, 7, 37, 14, 10, 42, 72, 66, 10, 68, 38, 58, 72, 8, 43, 110, 22, 33, 68, 29, 42, 71, 13, 46, 121, 28, 182, 200, 47, 9, 21, 60, 108, 28, 156, 19, 22, 85, 79, 151, 62, 56, 71, 60, 78, 226, 104, 192

Offset: 1

Author

Geoffrey H. Morley, Aug 02 2013

Keywords

• nonn

Links

• Geoffrey H. Morley, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to 3x+1 (or Collatz) problem

Programs

PARI

See A226614.

Formula

a(n) = A226609(A226612(floor(A226614(n)/3)+1)).

For n>227, this formula requires terms beyond A226609(10000).