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

Author

Artur Jasinski, Nov 04 2006

Keywords

• nonn

Examples

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

Links

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

Crossrefs

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

Programs

Mathematica

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

Extensions

Extended by Ray Chandler, Nov 16 2006