A256002 Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*4^k + 1 are composite.

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

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