A174786 Numbers n congruent to 3 (mod 6) such that n+2 and n+8 are primes.

3, 9, 15, 21, 39, 45, 51, 81, 99, 105, 129, 165, 171, 189, 225, 231, 249, 255, 261, 309, 345, 351, 381, 441, 459, 501, 555, 561, 585, 591, 639, 645, 651, 675, 819, 855, 879, 939, 945, 969, 975, 1011, 1089, 1095, 1101, 1179, 1185, 1215, 1221, 1275, 1281, 1299, 1359, 1365

Offset: 1

Author

Giovanni Teofilatto, Mar 29 2010

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A016945, A023201.

Programs

Mathematica

Select[6Range[230]-3,And@@PrimeQ[{#+2,#+8}]&] (* Harvey P. Dale, Aug 21 2011 *)

Extensions

Definition corrected and sequence extended - R. J. Mathar, Mar 30 2010