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 A028787 #15 Jul 08 2025 18:51:43 %S A028787 2,5,6,8,13,14,15,17,18,19,20,22,23,24,29,31,32,35,39,42,43,45,50,51, %T A028787 52,54,55,56,57,59,60,61,66,68,69,72 %N A028787 Nonsquares mod 74. %o A028787 (PARI) for(k=0,74,if(!issquare(Mod(k,74)),print1(k,", "))) \\ _Hugo Pfoertner_, Nov 29 2019 %Y A028787 Cf. A010435. %K A028787 nonn,fini,full %O A028787 1,1 %A A028787 _N. J. A. Sloane_ %E A028787 Incorrect term 37 removed by _Alonso del Arte_, Nov 29 2019