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 A038931 #11 Jul 08 2025 22:31:20 %S A038931 7,11,13,17,29,37,43,47,53,59,89,97,107,113,131,149,163,197,199,211, %T A038931 223,227,229,241,269,271,281,293,307,311,317,331,347,367,409,431,433, %U A038931 439,449,461,467,487,521,523,541 %N A038931 Primes p such that 53 is a square mod p. %C A038931 Also, primes p which are squares mod 53 (from the quadratic reciprocity law). - _Lekraj Beedassy_, Jul 13 2004 %H A038931 Vincenzo Librandi, <a href="/A038931/b038931.txt">Table of n, a(n) for n = 1..1000</a> %t A038931 Select[Prime[Range[100]], ! JacobiSymbol[53, #] == -1 &] (* _Vincenzo Librandi_, Sep 08 2012 *) %K A038931 nonn %O A038931 1,1 %A A038931 _N. J. A. Sloane_ %E A038931 Offset changed from 0 to 1 by _Vincenzo Librandi_, Sep 08 2012