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A256002 Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*4^k + 1 are composite. 0
66741, 308481, 436029, 636921, 1259541, 1384059, 1997589, 2038371, 2397951, 2473929, 2965569, 3885579, 3999399, 4210989, 4303311, 4693701, 4942311, 5067669, 5247051, 5367729, 5643249, 5859369, 6269871, 6385419, 6467361, 6660261, 6826329, 7336521, 8302269, 9026541 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

CROSSREFS

Subsequence of A251057.

Sequence in context: A022256 A237925 A251057 * A225560 A234402 A235024

Adjacent sequences:  A255999 A256000 A256001 * A256003 A256004 A256005

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, May 07 2015

STATUS

approved

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Last modified October 13 21:59 EDT 2019. Contains 327981 sequences. (Running on oeis4.)