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

1,1

Links

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

Example

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

Mathematica

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

Crossrefs

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

Sequence in context: A077679 A045863 A121023 * A350814 A169966 A140153

Adjacent sequences: A124517 A124518 A124519 * A124521 A124522 A124523

Keyword

nonn

Author

Artur Jasinski, Nov 04 2006

Extensions

Extended by Ray Chandler, Nov 16 2006

Status

approved