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 A038952 #9 Jul 08 2025 22:33:55 %S A038952 2,7,19,29,37,41,43,47,59,61,67,71,79,97,101,103,109,131,157,167,173, %T A038952 179,181,197,199,229,233,239,241,257,269,283,311,313,317,337,347,353, %U A038952 367,373,379,421,433,443,449,457 %N A038952 Primes p such that 69 is not a square mod p. %H A038952 Vincenzo Librandi, <a href="/A038952/b038952.txt">Table of n, a(n) for n = 1..1000</a> %t A038952 Select[Prime@Range[120], JacobiSymbol[69, #] == - 1 &] (* _Vincenzo Librandi_, Sep 09 2012 *) %o A038952 (PARI) select(n->!issquare(Mod(69,n)),primes(100)) \\ _Charles R Greathouse IV_, Sep 09 2012 %K A038952 nonn %O A038952 1,1 %A A038952 _N. J. A. Sloane_ %E A038952 Offset changed from 0 to 1 by _Vincenzo Librandi_, Sep 09 2012