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 A028747 #16 Jul 08 2025 18:49:00 %S A028747 3,5,6,7,10,11,12,14,20,22,23,24,27,28,29,31 %N A028747 Nonsquares mod 34. %o A028747 (PARI) for(k=0, 34, if(!issquare(Mod(k, 34)), print1(k, ", "))) \\ _Hugo Pfoertner_, Dec 02 2019 %Y A028747 Cf. A010395, A096013 (row 34). %K A028747 nonn,fini,full %O A028747 1,1 %A A028747 _N. J. A. Sloane_ %E A028747 Incorrect term 17 removed by _Alonso del Arte_, Nov 30 2019