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 A038907 #11 Jul 08 2025 22:28:38 %S A038907 2,3,11,17,29,31,37,41,67,83,97,101,103,107,131,149,157,163,167,173, %T A038907 181,197,199,223,227,229,233,239,263,281,293,313,331,347,359,367,379, %U A038907 397,421,431,433,461,463,479,487 %N A038907 Primes p such that 33 is a square mod p. %H A038907 Vincenzo Librandi, <a href="/A038907/b038907.txt">Table of n, a(n) for n = 1..1000</a> %t A038907 Select[Prime[Range[100]], JacobiSymbol[33, #] != -1 &] (* _Vincenzo Librandi_, Sep 07 2012 *) %K A038907 nonn %O A038907 1,1 %A A038907 _N. J. A. Sloane_