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A023207 Numbers n such that n and 2n + 9 both prime. +0
2
2, 5, 7, 11, 17, 19, 29, 31, 37, 47, 59, 61, 71, 79, 101, 107, 109, 127, 131, 137, 149, 151, 179, 211, 227, 229, 239, 241, 257, 269, 277, 281, 311, 317, 337, 359, 367, 389, 401, 409, 439, 449, 479, 487, 491, 521, 541, 547, 557, 571, 577, 607, 641, 647, 659, 709, 719, 739 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A049042 A020605 A045348 this_sequence A038611 A023213 A162575

Adjacent sequences: A023204 A023205 A023206 this_sequence A023208 A023209 A023210

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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