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

1,1

Comments

The numerators are in A186107.

Links

Table of n, a(n) for n=1..30.

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

Formula

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

Crossrefs

Cf. A126241 (dropping times)

Sequence in context: A337109 A210579 A217863 * A131560 A067709 A229238

Adjacent sequences: A186105 A186106 A186107 * A186109 A186110 A186111

Keyword

nonn,frac

Author

T. D. Noe, Feb 12 2011

Status

approved