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 A010385 #20 Oct 06 2022 11:33:08
%S A010385 0,1,2,3,4,6,8,9,12,13,16,18
%N A010385 Squares mod 23.
%t A010385 Join[{0}, Select[Range[22], JacobiSymbol[#, 23] == 1&]] (* _Jean-François Alcover_, Oct 07 2018 *)
%o A010385 (Sage) [quadratic_residues(23)] # _Zerinvary Lajos_, May 24 2009
%Y A010385 Row 23 of A096008. Row 9 of A063987. A028736 (complement), A278580.
%K A010385 nonn,fini,full
%O A010385 1,3
%A A010385 _N. J. A. Sloane_