A186108 Denominator of the frequency of the n-th dropping time in the Collatz iteration.

2, 4, 16, 16, 128, 256, 256, 2048, 8192, 32768, 16384, 262144, 262144, 2097152, 8388608, 16777216, 33554432, 134217728, 536870912, 1073741824, 4294967296, 2147483648, 34359738368, 137438953472, 274877906944, 274877906944, 2199023255552, 4398046511104, 1099511627776, 35184372088832

Offset: 1

Author

T. D. Noe, Feb 12 2011

Keywords

• nonn
• frac

Comments

The numerators are in A186107.

Links

• Index entries for sequences related to 3x+1 (or Collatz) problem

Crossrefs

Cf. A126241 (dropping times)

Formula

a(n) = denominator of A186009(n) / 2^A020914(n-1).