A124519 Numbers k such that 12*k - 1 and 12*k + 1 are twin primes.

1, 5, 6, 9, 15, 16, 19, 20, 26, 29, 35, 36, 50, 55, 69, 85, 86, 91, 96, 110, 119, 121, 124, 134, 135, 139, 149, 156, 161, 169, 174, 176, 189, 195, 216, 224, 226, 250, 260, 264, 271, 275, 280, 281, 289, 294, 295, 306, 314, 321, 335, 341, 344, 355, 356, 379, 399

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Example

1 is in the sequence since 12*1 - 1 = 11 and 12*1 + 1 = 13 are twin primes.

Mathematica

Select[Range[400], And @@ PrimeQ[{-1, 1} + 12# ] &] (* Ray Chandler, Nov 16 2006 *)

Crossrefs

Cf. A040040, A045753, A002822, A124065, A124518, A124520, A124521, A124522, A063983.

Sequence in context: A328115 A327975 A227611 * A322959 A154311 A279702

Adjacent sequences: A124516 A124517 A124518 * A124520 A124521 A124522

Keyword

nonn

Author

Artur Jasinski, Nov 04 2006

Extensions

Extended by Ray Chandler, Nov 16 2006

Status

approved