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A165667 Primes p such that (p^2-2)/7 is also prime. 3
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 14 19:53 EDT 2021. Contains 343903 sequences. (Running on oeis4.)