A120227 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

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

MATHEMATICA

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

CROSSREFS

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

Sequence in context: A102166 A024894 A153880 * A276154 A328770 A138626

Adjacent sequences: A120224 A120225 A120226 * A120228 A120229 A120230

KEYWORD

nonn

AUTHOR

Zak Seidov, Jun 10 2006

STATUS

approved