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 A010382 #20 Dec 20 2019 20:44:18 %S A010382 0,1,4,5,9,16 %N A010382 Squares mod 20. %C A010382 Range of A070442. - _Reinhard Zumkeller_, Apr 24 2009 %t A010382 Union[PowerMod[Range[20], 2, 20]] (* _Alonso del Arte_, Dec 20 2019 *) %o A010382 (Sage) [quadratic_residues(20)] # _Zerinvary Lajos_, May 24 2009 %o A010382 (Scala) (1 to 20).map(n => (n * n) % 20).toSet.toSeq.sorted // _Alonso del Arte_, Dec 20 2019 %Y A010382 Cf. A010378, A010462, A010421. - _Reinhard Zumkeller_, Apr 24 2009 %Y A010382 Row 20 of A096008. %Y A010382 Cf. A028733. %K A010382 nonn,fini,full,easy %O A010382 1,3 %A A010382 _N. J. A. Sloane_