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 A038897 #11 Jul 08 2025 22:27:39 %S A038897 2,7,11,13,19,23,29,41,43,67,73,79,83,101,103,107,173,191,193,197,199, %T A038897 227,233,251,257,263,269,277,283,317,349,353,359,367,379,383,397,409, %U A038897 419,431,449,461,467,479,503,509 %N A038897 23 is a square mod p. %C A038897 Also, only entries p=1 (mod 4) of the sequence are squares mod 23 (from the quadratic reciprocity law). - _Lekraj Beedassy_, Jul 21 2004 %H A038897 Vincenzo Librandi, <a href="/A038897/b038897.txt">Table of n, a(n) for n = 1..1000</a> %t A038897 Select[Prime[Range[100]], JacobiSymbol[23, #] != -1 &] (* _Vincenzo Librandi_, Sep 07 2012 *) %K A038897 nonn %O A038897 1,1 %A A038897 _N. J. A. Sloane_