%I #6 Sep 08 2022 08:46:01
%S 5,29,47,197,239,389,509,719,797,2309,2447,3359,4229,4799,6047,6269,
%T 6959,8447,10079,10949,11549,12479,14447,17669,18047,19997,20399,
%U 22469,24197,28319,31247,33797,34319,38639,45599,51197,51839,55109
%N Primes of the form 2n^2 - 3.
%H Vincenzo Librandi, <a href="/A201712/b201712.txt">Table of n, a(n) for n = 1..5000</a>
%t Select[Table[2n^2-3,{n,1,1000}],PrimeQ]
%o (Magma) [a: n in [1..300] | IsPrime(a) where a is 2*n^2-3];
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Dec 04 2011