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 A038879 #13 Jul 08 2025 22:25:56
%S A038879 2,3,5,13,31,37,41,43,53,67,71,79,83,89,107,151,157,163,173,191,197,
%T A038879 199,227,239,241,271,277,281,283,293,307,311,317,347,359,373,397,401,
%U A038879 409,431,439,443,449,467,479,521
%N A038879 10 is a square mod p.
%C A038879 2 and 5 together with primes congruent to +/- {1, 3, 9, 13} mod 40. - _Eric M. Schmidt_, Jan 25 2014
%H A038879 Vincenzo Librandi, <a href="/A038879/b038879.txt">Table of n, a(n) for n = 1..1000</a>
%t A038879 Select[Prime[Range[100]], JacobiSymbol[10, #] != -1 &] (* _Vincenzo Librandi_, Sep 07 2012 *)
%K A038879 nonn
%O A038879 1,1
%A A038879 _N. J. A. Sloane_