A186110 Denominator of the cumulative frequency of the dropping time in the Collatz iteration.

2, 4, 16, 8, 128, 256, 16, 2048, 8192, 32768, 32768, 262144, 16384, 2097152, 8388608, 16777216, 33554432, 134217728, 536870912, 1073741824, 4294967296, 4294967296, 34359738368, 137438953472, 274877906944, 137438953472, 2199023255552, 4398046511104, 4398046511104, 35184372088832

Offset: 1

Author

T. D. Noe, Feb 12 2011

Keywords

• nonn
• frac

Comments

The numerators are in A186109. The frequency of the n-th dropping time is A186107(n)/A186108(n).

Links

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

Crossrefs

Cf. A126241 (dropping times)

Formula

a(n) = denominator of sum_{k=1..n} A186009(k) / 2^A020914(k-1).