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A014962 Odd numbers n such that n divides 25^n - 1. 0
1, 3, 9, 21, 27, 63, 81, 93, 147, 171, 189, 243, 279, 441, 513, 567, 609, 651, 729, 837, 903, 1029, 1197, 1323, 1539, 1701, 1827, 1953, 2187, 2511, 2667, 2709, 2883, 2943, 3087, 3249, 3591, 3969, 4263, 4401, 4557, 4617, 5103, 5301, 5481, 5859, 6321 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also, numbers n such that n divides s(n), where s(1)=1, s(k)=s(k-1)+k*25^(k-1). Equivalently, numbers n that divide ((24*n - 1)*25^n + 1) / 24^2 (cf. A014943).

LINKS

Table of n, a(n) for n=1..47.

CROSSREFS

Cf. A014945, A014946, A014949, A014950, A014951, A014956, A014957, A128358, A128360, A014959, A014960.

Sequence in context: A244972 A044055 A029542 * A014945 A045590 A242740

Adjacent sequences:  A014959 A014960 A014961 * A014963 A014964 A014965

KEYWORD

nonn

AUTHOR

Olivier Gérard

EXTENSIONS

Edited by Max Alekseyev, Nov 16 2019

STATUS

approved

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Last modified December 13 06:26 EST 2019. Contains 329968 sequences. (Running on oeis4.)