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A023271 Primes p such that p, p+6, p+12, p+18 are all primes. 14
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; text; internal format)
OFFSET

1,1

COMMENTS

Smallest member of a "sexy" prime quadruple.

LINKS

Table of n, a(n) for n=1..41.

Eric Weisstein's World of Mathematics, Sexy Primes.

MATHEMATICA

lst={}; Do[p=Prime[n]; If[PrimeQ[p+6]&&PrimeQ[p+12]&&PrimeQ[p+18], AppendTo[lst, p]], {n, 8!}]; lst [From Vladimir Joseph Stephan Orlovsky, Aug 29 2008]

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

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

Edited by N. J. A. Sloane, Aug 04 2009 following a suggestion from Daniel Forgues

STATUS

approved

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Last modified April 17 06:56 EDT 2014. Contains 240634 sequences.