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 A005137 M0233 #11 Oct 26 2023 22:51:29 %S A005137 0,2,2,2,4,2,4,4,4,4,4,6,8,6,6,6,8,6,8,8,8,8,8,10,12,10,10,10,12,10,12 %N A005137 Highest minimal distance of self-dual code of length 2n. %D A005137 J. H. Conway and N. J. A. Sloane, A new upper bound on the minimal distance of self-dual codes, IEEE Trans. Inform. Theory, 36 (1990), 1319-1334. %D A005137 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. xxiv. %D A005137 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %K A005137 nonn,hard %O A005137 0,2 %A A005137 _N. J. A. Sloane_