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A023271
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Primes p such that (p,p+6,p+12,p+18) are all primes.
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8
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5, 11, 41, 61, 251, 601, 641, 1091, 1481, 1601, 1741, 1861, 2371, 2671, 3301, 3911, 4001, 5101, 5381, 5431, 5641, 6311, 6361, 9461, 11821, 12101, 12641, 13451, 14621, 14741, 15791, 15901, 17471, 18211, 19471, 20341, 21481, 23321, 24091, 26171, 26681
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Smallest member of a "sexy" prime quadruple.
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LINKS
| Eric Weisstein's World of Mathematics, Sexy Primes.
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MATHEMATICA
| lst={}; Do[p=Prime[n]; If[PrimeQ[p+6]&&PrimeQ[p+12]&&PrimeQ[p+18], AppendTo[lst, p]], {n, 8!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 29 2008]
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CROSSREFS
| Cf. A023201, A046117.
Cf. A046122, A046123, A046124.
Sequence in context: A154297 A089441 A046121 * A159049 A047976 A006382
Adjacent sequences: A023268 A023269 A023270 * A023272 A023273 A023274
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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EXTENSIONS
| Edited by N. J. A. Sloane, Aug 04 2009 following a suggestion from Daniel Forgues
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