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 A028775 #16 Jul 22 2025 13:49:16 %S A028775 3,6,11,12,13,15,17,21,22,23,24,26,27,29,30,34,37,42,43,44,46,48,52, %T A028775 53,54,55,57,58,60,61 %N A028775 Nonsquares mod 62. %t A028775 Complement[Range[0, 61], PowerMod[Range[62], 2, 62]] (* _Alonso del Arte_, Dec 31 2019 *) %o A028775 (Scala) (0 to 61).diff((1 to 62).map(n => n * n % 62)) // _Alonso del Arte_, Dec 31 2019 %Y A028775 Cf. A010423, A028744 (subsequence). %K A028775 nonn,fini,full,easy %O A028775 1,1 %A A028775 _N. J. A. Sloane_ %E A028775 Incorrect term 31 removed by _Alonso del Arte_, Nov 29 2019