A120227 Numbers k such that 5+k and 5*k+1 are prime.

2, 6, 8, 12, 14, 26, 36, 38, 42, 48, 54, 56, 62, 66, 84, 92, 98, 104, 108, 126, 132, 152, 162, 176, 188, 194, 206, 218, 234, 236, 246, 258, 264, 272, 276, 302, 306, 344, 348, 362, 374, 416, 426, 428, 444, 456, 462, 474, 482, 504, 518, 542, 558, 572, 594, 602

Offset: 1

Author

Zak Seidov, Jun 10 2006

Keywords

• nonn

Comments

This sequence is infinite under Dickson's conjecture. - Charles R Greathouse IV, Apr 16 2012

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A092945, A106057, A085063, A120223, A120224, A120225, A120226.

Programs

Mathematica

Select[Range[700],And@@PrimeQ[{#+5,5#+1}]&] (* Harvey P. Dale, Dec 18 2011 *)