%I M3719 #11 Apr 04 2021 13:44:44
%S 4,152,2630,31500,303534,2530976,19030428,132386340,866782510,
%T 5405853200
%N Number of tree-rooted toroidal maps with 2 faces and n vertices and without separating loops.
%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. A006440.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_
%E Name clarified by _Andrew Howroyd_, Apr 04 2021