This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A217496 #17 Sep 08 2022 08:46:04
%S A217496 23,131,191,911,1223,1451,1571,1823,3323,3671,3851,5651,6323,6791,
%T A217496 7523,8291,9371,10223,12671,15731,16091,16823,25931,28751,29723,39191,
%U A217496 43223,50591,53831,55823,60611,62723,64151,64871,68531,73823,77723,80111,87491,90023
%N A217496 Primes of the form 2*n^2 + 50*n + 23.
%C A217496 Conjecture: 2^a(n)-1 is not prime; in other words, these primes are included in A054723.
%C A217496 2*a(n)+579 is a square. - _Vincenzo Librandi_, Mar 04 2013
%H A217496 Vincenzo Librandi, <a href="/A217496/b217496.txt">Table of n, a(n) for n = 1..3000</a>
%t A217496 Select[Table[2 n^2 + 50 n + 23, {n, 0, 500}], PrimeQ]
%o A217496 (Magma) [a: n in [0..200] | IsPrime(a) where a is 2*n^2 + 50*n + 23];
%Y A217496 Cf. A054723, A176549, A217494.
%Y A217496 Subsequence of A002145.
%K A217496 nonn,easy
%O A217496 1,1
%A A217496 _Vincenzo Librandi_, Oct 09 2012