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A023238 Numbers n such that n and 10n + 3 both prime. +0
3
2, 5, 7, 11, 17, 19, 23, 29, 31, 37, 43, 59, 61, 67, 73, 101, 103, 109, 137, 149, 173, 191, 193, 197, 199, 211, 227, 229, 233, 239, 263, 269, 271, 283, 331, 337, 353, 359, 367, 373, 379, 383, 401, 409, 449, 467, 479, 499, 523, 541, 557, 569, 607, 613, 617, 647, 673, 683 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A062409 A089781 A144832 this_sequence A049042 A020605 A045348

Adjacent sequences: A023235 A023236 A023237 this_sequence A023239 A023240 A023241

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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