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A023253 Numbers n such that n remains prime through 2 iterations of function f(x) = 5x + 4. +0
1
5, 17, 83, 101, 131, 251, 257, 263, 389, 419, 461, 467, 521, 587, 797, 809, 1217, 1319, 1511, 1721, 1847, 1907, 2141, 2531, 2579, 2693, 2699, 3623, 4079, 4217, 4253, 4283, 4493, 4673, 5333, 5507, 5711, 6011, 6089, 6353, 6599, 6761, 6803, 6947, 6983, 7013 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A126956 A009234 A053418 this_sequence A002020 A038183 A036756

Adjacent sequences: A023250 A023251 A023252 this_sequence A023254 A023255 A023256

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified August 29 14:50 EDT 2008. Contains 143238 sequences.


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