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 A038919 #20 Jul 08 2025 22:30:03 %S A038919 2,5,23,31,37,41,43,59,61,73,83,103,107,113,127,131,139,163,173,197, %T A038919 223,241,251,269,271,277,283,307,337,349,353,359,367,373,379,389,401, %U A038919 409,419,431,433,443,449,461,467 %N A038919 Primes p such that 41 is a square mod p. %C A038919 The only difference between this sequence and A191030 is the presence of a(6) = 41. - _Zak Seidov_, May 24 2013 %H A038919 Vincenzo Librandi, <a href="/A038919/b038919.txt">Table of n, a(n) for n = 1..1000</a> %t A038919 Select[Prime[Range[100]], JacobiSymbol[41, #] != -1 &] (* _Vincenzo Librandi_, Sep 07 2012 *) %Y A038919 Cf. A191030. - _Zak Seidov_, May 24 2013 %K A038919 nonn %O A038919 1,1 %A A038919 _N. J. A. Sloane_