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Number of tree-rooted toroidal maps with 3 faces and n vertices and without separating loops or isthmuses.
(Formerly M4755)
1

%I M4755 #10 Apr 04 2021 13:43:29

%S 10,705,14478,154420,1092640,5826492,25240410,93203561,303143970,

%T 889015725

%N Number of tree-rooted toroidal maps with 3 faces and n vertices and without separating loops or isthmuses.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H 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 Cf. A006434.

%K nonn,more

%O 1,1

%A _N. J. A. Sloane_

%E Name clarified by _Andrew Howroyd_, Apr 04 2021