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A023225 Numbers n such that n and 7n + 6 both prime. +0
12
5, 11, 13, 19, 23, 31, 41, 43, 59, 61, 71, 83, 103, 109, 113, 149, 151, 173, 179, 199, 211, 223, 229, 233, 241, 263, 269, 281, 283, 353, 373, 379, 383, 389, 419, 421, 431, 433, 439, 479, 499, 503, 541, 563, 569, 571, 593, 613, 619, 631, 641, 643, 683, 709, 719, 739, 761 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

lst={}; Do[If[PrimeQ[n]&&PrimeQ[7*n+6], AppendTo[lst, n]], {n, 13^3}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 08 2008]

CROSSREFS

Sequence in context: A087490 A153418 A079019 this_sequence A098085 A104216 A040144

Adjacent sequences: A023222 A023223 A023224 this_sequence A023226 A023227 A023228

KEYWORD

nonn

AUTHOR

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

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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