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A046124 Last member of a sexy prime quadruple: value of p+18 such that p, p+6, p+12 and p+18 are all prime. 4
23, 29, 59, 79, 269, 619, 659, 1109, 1499, 1619, 1759, 1879, 2389, 2689, 3319, 3929, 4019, 5119, 5399, 5449, 5659, 6329, 6379, 9479, 11839, 12119, 12659, 13469, 14639, 14759, 15809, 15919, 17489, 18229, 19489, 20359, 21499, 23339, 24109 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

Maxie D. Schmidt, New Congruences and Finite Difference Equations for Generalized Factorial Functions, arXiv:1701.04741 [math.CO], 2017.

Eric Weisstein's World of Mathematics, Sexy Primes.

FORMULA

a(n) = A023271(n)+18 = A046122(n)+12 = A046123(n)+6. - Michel Marcus, Jan 06 2015

MATHEMATICA

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

PROG

(MAGMA) [p+18: p in PrimesUpTo(30000) | IsPrime(p+6) and IsPrime(p+12) and IsPrime(p+18)]; // Vincenzo Librandi, Jan 07 2015

CROSSREFS

Cf. A023271, A046122, A046123.

Sequence in context: A174260 A097436 A063980 * A157677 A092518 A110584

Adjacent sequences:  A046121 A046122 A046123 * A046125 A046126 A046127

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Dec 11 1999

STATUS

approved

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Last modified November 24 07:33 EST 2020. Contains 338607 sequences. (Running on oeis4.)