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 A038886 #8 Jul 08 2025 22:26:18 %S A038886 3,17,19,23,29,37,41,53,59,71,73,79,83,89,97,109,127,131,139,149,151, %T A038886 191,197,227,239,241,251,257,263,277,283,307,313,317,353,359,373,389, %U A038886 409,419,421,431,433,463,467,487 %N A038886 Primes p such that 14 is not a square mod p. %H A038886 Vincenzo Librandi, <a href="/A038886/b038886.txt">Table of n, a(n) for n = 1..1000</a> %t A038886 Select[Prime@Range[120], JacobiSymbol[14, #] == -1 &] (* _Vincenzo Librandi_, Sep 08 2012 *) %K A038886 nonn %O A038886 1,1 %A A038886 _N. J. A. Sloane_ %E A038886 Offset changed from 0 to 1 by _Vincenzo Librandi_, Sep 08 2012