A124520 Numbers k such that 14*k - 1 and 14*k + 1 are twin primes.

3, 30, 33, 63, 75, 78, 93, 102, 123, 138, 153, 162, 165, 192, 195, 240, 252, 273, 297, 303, 342, 387, 393, 420, 435, 438, 450, 468, 483, 522, 525, 540, 588, 630, 633, 660, 663, 717, 738, 747, 750, 765, 798, 825, 837, 855, 957, 978, 993, 1023, 1032, 1062

Offset: 1

Author

Artur Jasinski, Nov 04 2006

Keywords

• nonn

Examples

			3 is in the sequence since 14*3 - 1 = 41 and 14*3 + 1 = 43 are twin primes.
		

Links

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

Crossrefs

Cf. A040040, A045753, A002822, A124065, A124518, A124519, A124521, A124522, A063983.

Programs

Mathematica

Select[Range[1100], And @@ PrimeQ[{-1, 1} + 14# ] &] (* Ray Chandler, Nov 16 2006 *)

Extensions

Extended by Ray Chandler, Nov 16 2006