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 A006440 M4756 #9 Apr 04 2021 13:45:01 %S A006440 10,805,23730,431319,5862920,65548890,636520890,5555779185,44603489700 %N A006440 Number of tree-rooted toroidal maps with 3 faces and n vertices and without separating loops. %D A006440 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006440 T. R. S. Walsh and A. B. Lehman, <a href="http://dx.doi.org/10.1016/0095-8956(75)90050-7">Counting rooted maps by genus. III: Nonseparable maps</a>, J. Combinatorial Theory Ser. B 18 (1975), 222-259. %Y A006440 Cf. A006439. %K A006440 nonn,more %O A006440 1,1 %A A006440 _N. J. A. Sloane_ %E A006440 Name clarified by _Andrew Howroyd_, Apr 04 2021