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Search: id:A023245
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A023245 Numbers n such that n remains prime through 2 iterations of function f(x) = 2x + 9. +0
1
5, 11, 19, 31, 59, 61, 71, 101, 109, 151, 179, 239, 241, 269, 281, 389, 409, 439, 449, 521, 571, 641, 659, 719, 829, 911, 971, 1051, 1061, 1181, 1201, 1229, 1319, 1361, 1439, 1579, 1669, 1699, 1741, 1831, 1949, 2269, 2341, 2371, 2521, 2549, 2579, 2609, 2671 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A075322 A079850 A065995 this_sequence A125003 A062718 A105914

Adjacent sequences: A023242 A023243 A023244 this_sequence A023246 A023247 A023248

KEYWORD

nonn

AUTHOR

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

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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