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A023213 Numbers n such that n and 4n + 3 both prime. +0
9
2, 5, 7, 11, 17, 19, 31, 37, 41, 47, 59, 67, 89, 107, 109, 149, 151, 157, 179, 181, 227, 229, 241, 257, 271, 307, 331, 349, 359, 367, 389, 401, 439, 457, 461, 467, 487, 499, 509, 521, 571, 577, 587, 599, 647, 661, 677, 691, 719, 769, 797, 829, 839, 877, 881, 907, 929, 941 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

lst={}; Do[p=Prime[n]; If[PrimeQ[4*p+3], AppendTo[lst, p]], {n, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 10 2009]

CROSSREFS

Sequence in context: A045348 A023207 A038611 this_sequence A162575 A066408 A142352

Adjacent sequences: A023210 A023211 A023212 this_sequence A023214 A023215 A023216

KEYWORD

nonn

AUTHOR

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

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.


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