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Search: id:A023274
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A023274 Numbers n such that n remains prime through 3 iterations of function f(x) = 2x + 5. +0
3
13, 31, 37, 67, 73, 181, 367, 541, 661, 997, 1087, 1117, 1327, 1861, 2179, 2293, 2473, 2713, 2719, 3271, 3727, 4363, 5281, 5443, 5749, 7459, 8089, 8707, 9109, 9181, 9337, 10357, 10639, 12553, 13183, 14923, 16183, 16249, 17341, 17419, 17761, 17923, 17989 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A103665 A040050 A040086 this_sequence A129864 A080387 A097443

Adjacent sequences: A023271 A023272 A023273 this_sequence A023275 A023276 A023277

KEYWORD

nonn

AUTHOR

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

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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