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Search: id:A023239
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A023239 Numbers n such that n and 10n + 7 both prime. +0
1
3, 13, 19, 31, 61, 67, 79, 97, 109, 127, 163, 199, 223, 229, 241, 277, 283, 313, 367, 379, 421, 433, 439, 463, 487, 523, 541, 547, 571, 619, 631, 673, 691, 751, 757, 787, 811, 823, 829, 853, 859, 883, 937, 967, 1033, 1093, 1117, 1171, 1237, 1249, 1291, 1303, 1321 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A079419 A117300 A023215 this_sequence A018621 A024469 A055202

Adjacent sequences: A023236 A023237 A023238 this_sequence A023240 A023241 A023242

KEYWORD

nonn

AUTHOR

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

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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