%I
%S 7,43,151,331,907,1303,2311,3607,4363,6091,13003,14407,17431,19051,
%T 20743,26251,34603,36871,46663,51991,66571,72907,79531,90007,108907,
%U 129607,133963,156823,161611,166471,171403,219031,224683,311371
%N Primes of the form 9n^2 + 7.
%H Vincenzo Librandi, <a href="/A201707/b201707.txt">Table of n, a(n) for n = 1..5000</a>
%t Select[Table[9n^2+7,{n,0,1000}],PrimeQ]
%o (MAGMA) [a: n in [0..300]  IsPrime(a) where a is 9*n^2+7];
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Dec 04 2011
