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A014951 Positive integers n such that n divides 12^n - 1. 8
1, 11, 121, 253, 1331, 2783, 5819, 11891, 14641, 30613, 64009, 130801, 133837, 161051, 273493, 336743, 558877, 704099, 768361, 849299, 1438811, 1472207, 1771561, 3008423, 3078251, 3544453, 3704173, 6147647, 6290339, 7745089 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also, the integers n such that n divide s(n), where s(1)=1 and s(k)=s(k-1)+k*12^(k-1).

Contribution from Alexander Adamchuk, May 16 2010: (Start)

11 divides a(n) for n>1.

All powers of 11 are the terms.

Prime divisors of a (n) in the order of their appearance {11, 23, 47, 3037, 7019, 2663, 5171, 47917, 12973, ...}. (End)

LINKS

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

CROSSREFS

Sequence in context: A045595 A228440 A015958 * A223223 A240942 A216131

Adjacent sequences:  A014948 A014949 A014950 * A014952 A014953 A014954

KEYWORD

nonn

AUTHOR

Olivier Gérard

EXTENSIONS

a(11)-a(65) from Alexander Adamchuk, May 16 2010

Edited by Max Alekseyev, May 20 2011

STATUS

approved

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Last modified November 13 19:25 EST 2018. Contains 317149 sequences. (Running on oeis4.)