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A137674 Numbers m such that A137671(m) = 1. 5
1, 2, 5, 13, 35, 84, 198, 414, 960, 1898, 4263, 8556, 18473, 37490, 79526, 159956, 338873, 680306, 1438941, 2869908, 6057397, 12038460, 25300258, 50460684, 105275708, 211424744, 437486956, 879869316, 1810901110, 3642407379, 7495644753, 15038540180, 30957576741 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..33.

Rémy Sigrist, C program for A137674

FORMULA

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.

PROG

(C) See Links section.

CROSSREFS

Cf. A000225, A137671, A137672, A137673.

Sequence in context: A114298 A112839 A331755 * A048781 A291242 A097919

Adjacent sequences:  A137671 A137672 A137673 * A137675 A137676 A137677

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Feb 05 2008

EXTENSIONS

More terms from Rémy Sigrist, Jun 28 2019

STATUS

approved

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Last modified October 28 10:40 EDT 2020. Contains 338054 sequences. (Running on oeis4.)