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 A006425 M3700 #10 Apr 05 2021 11:56:15 %S A006425 4,79,900,7885,59080,398846,2499096,14805705,83969600,459868530, %T A006425 2447439384,12718070274,64766697520,324156347260,1598200903280, %U A006425 7776728909121,37404399901296,178060831286890,839857764202520,3928581810398630,18239060530882224,84101317494787684 %N A006425 Number of rooted toroidal maps with 2 vertices and n faces and no isthmuses. %D A006425 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006425 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 A006425 A diagonal of A343092. %K A006425 nonn %O A006425 1,1 %A A006425 _N. J. A. Sloane_ %E A006425 Name clarified and terms a(11) and beyond from _Andrew Howroyd_, Apr 05 2021