A165667 Primes p such that (p^2-2)/7 is also prime.

11, 17, 31, 53, 67, 73, 109, 151, 199, 241, 269, 389, 563, 599, 613, 661, 739, 773, 809, 977, 983, 991, 1033, 1061, 1123, 1151, 1187, 1193, 1249, 1277, 1319, 1327, 1453, 1487, 1543, 1831, 1879, 1907, 2027, 2083, 2089, 2237, 2251, 2383, 2447, 2579, 2593, 2621, 2671

Offset

1,1

Links

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

Formula

A000040 \ A165666.

Example

For p=11, (11^2-2)/7=17. For p=17,(17^2-2)/7=41. For p=31,(31^2-2)/7=137.

Mathematica

Select[Prime[Range[500]], PrimeQ[(#^2-2)/7]&] (* Harvey P. Dale, Jan 06 2013 *)

Crossrefs

Cf. A165666, A165668

Sequence in context: A258866 A189324 A127703 * A339180 A086711 A039514

Adjacent sequences: A165664 A165665 A165666 * A165668 A165669 A165670

Keyword

nonn

Author

Vincenzo Librandi, Sep 24 2009

Extensions

More terms from R. J. Mathar and Charles R Greathouse IV, Oct 12 2009

Status

approved