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A186108 Denominator of the frequency of the n-th dropping time in the Collatz iteration. 3
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 (list; graph; refs; listen; history; text; internal format)
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: A135569 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

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Last modified January 22 10:32 EST 2019. Contains 319363 sequences. (Running on oeis4.)