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%I M4740 #20 Dec 14 2017 21:20:43
%S 1,10,167,1720,24164,256116,3392843,36703824,472592916,5188948072,
%T 65723863196,729734918432,9145847808784,102432266545800,
%U 1274461449989715,14373136466094880,177882700353757460,2017523504473479992,24868664942648145372
%N Number of rooted genus-1 maps with n edges.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D T. R. S. Walsh, Combinatorial Enumeration of Non-Planar Maps. Ph.D. Dissertation, Univ. of Toronto, 1971.
%H T. R. S. Walsh and A. B. Lehman, <a href="http://dx.doi.org/10.1016/0095-8956(72)90056-1">Counting rooted maps by genus</a>, J. Comb. Thy B13 (1972), 122-141 and 192-218.
%H <a href="/A007401/a007401_1.pdf">Notes</a>
%Y Row maxima of A269921.
%K nonn
%O 2,2
%A _N. J. A. Sloane_.
%E More terms from _Sean A. Irvine_, Feb 24 2017
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