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A137674 Numbers m such that A137671(m) = 1. 4
1, 2, 5, 13, 35, 84, 198, 414, 960, 1898, 4263, 8556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A137671(a(n)) = 1; A137672(a(n))=1;

for n>1: A137671(a(n)-1) = 2^(n-1)-1 = A000225(n-1); A137672(a(n)-1) = n-1;

a(n) = A137673(A137671(a(n)-1)) + 1.

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Sequence in context: A029885 A114298 A112839 * A048781 A291242 A097919

Adjacent sequences:  A137671 A137672 A137673 * A137675 A137676 A137677

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 05 2008

STATUS

approved

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Last modified May 26 19:31 EDT 2019. Contains 323597 sequences. (Running on oeis4.)