A165666 - OEIS

%I #12 Feb 15 2014 20:24:34

%S 2,3,5,7,13,19,23,29,37,41,43,47,59,61,71,79,83,89,97,101,103,107,113,

%T 127,131,137,139,149,157,163,167,173,179,181,191,193,197,211,223,227,

%U 229,233,239,251,257,263,271,277,281,283,293,307,311,313,317,331,337

%N Primes p such that (p^2-2)/7 is not prime.

%H Vincenzo Librandi, <a href="/A165666/b165666.txt">Table of n, a(n) for n = 1..1000</a>

%F A000040 \ A165667.

%t Select[Prime[Range[100]],!PrimeQ[(#^2-2)/7]&] (* _Harvey P. Dale_, Jun 13 2011 *)

%Y Cf. A165667, A165668.

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Sep 24 2009

%E Entries checked by _R. J. Mathar_ and _Charles R Greathouse IV_, Oct 12 2009