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 A010381 #24 Nov 13 2023 07:44:31 %S A010381 0,1,4,5,6,7,9,11,16,17 %N A010381 Squares mod 19. %t A010381 Union[PowerMod[Range[19], 2, 19]] (* _Alonso del Arte_, Dec 19 2019 *) %o A010381 (Sage) [quadratic_residues(19)] # _Zerinvary Lajos_, May 24 2009 %o A010381 (Scala) (1 to 19).map(n => (n * n) % 19).toSet.toSeq.sorted // _Alonso del Arte_, Dec 19 2019 %Y A010381 Row 19 of A096008. %Y A010381 Cf. A028732. %K A010381 nonn,fini,full %O A010381 1,3 %A A010381 _N. J. A. Sloane_