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Number of nonseparable toroidal tree-rooted maps with n + 4 edges and n + 1 vertices.
(Formerly M4754)
2

%I M4754 #9 Apr 05 2021 11:58:21

%S 10,595,11010,111650,773640,4104225,17838730,66390610,218140650

%N Number of nonseparable toroidal tree-rooted maps with n + 4 edges and n + 1 vertices.

%C The number of faces is 3. - _Andrew Howroyd_, Apr 05 2021

%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. A006414, A006415.

%K nonn,more

%O 0,1

%A _N. J. A. Sloane_

%E Name clarified by _Andrew Howroyd_, Apr 05 2021