%I #6 Sep 08 2022 08:46:01
%S 13,73,173,313,1613,1993,3373,4493,5113,6473,7213,7993,13513,19213,
%T 21773,25913,33613,36973,38713,40493,46073,49993,58313,60493,67273,
%U 71993,74413,76873,95213,115513,131213,154873,172973,176713,204013
%N Primes of the form 5n^2 - 7.
%H Vincenzo Librandi, <a href="/A201788/b201788.txt">Table of n, a(n) for n = 1..5000</a>
%t Select[Table[5n^2-7,{n,2,1000}],PrimeQ]
%o (Magma) [a: n in [2..400] | IsPrime(a) where a is 5*n^2-7];
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Dec 05 2011