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Search: id:A023216
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A023216 Numbers n such that n and 4n + 9 both prime. +0
1
2, 5, 7, 11, 13, 23, 37, 41, 43, 47, 67, 71, 97, 103, 113, 137, 151, 163, 167, 173, 181, 191, 197, 211, 233, 251, 263, 271, 277, 293, 307, 317, 397, 401, 421, 431, 433, 463, 467, 491, 557, 571, 587, 593, 607, 617, 653, 683, 727, 757, 811, 823, 863, 877, 881, 883, 887, 907 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A045347 A098170 A120330 this_sequence A079449 A038885 A079379

Adjacent sequences: A023213 A023214 A023215 this_sequence A023217 A023218 A023219

KEYWORD

nonn

AUTHOR

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

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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