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 A028796 #15 Sep 08 2022 08:44:50 %S A028796 2,5,6,8,13,14,15,18,19,20,22,24,32,34,35,39,42,43,45,46,47,50,52,53, %T A028796 54,55,56,57,58,60,62,66,67,71,72,73,74,76,79,80,82 %N A028796 Nonsquares mod 83. %t A028796 Complement[Range[0, 82], PowerMod[Range[83], 2, 83]] (* _Alonso del Arte_, Jan 23 2020 *) %o A028796 (Scala) (0 to 82).diff((1 to 83).map(n => n * n % 83)) // _Alonso del Arte_, Jan 23 2020 %o A028796 (Magma) [n: n in [0..82] | not IsSquare(R! n) where R := ResidueClassRing(83)]; // _Vincenzo Librandi_, Jan 24 2020 %Y A028796 Cf. A010444 (complement), A096013 (row 83). %K A028796 nonn,fini,full,easy %O A028796 1,1 %A A028796 _N. J. A. Sloane_