%I M1163 #12 Mar 29 2017 20:17:56
%S 1,2,4,8,29,92,403,1846,9239,48028,259567
%N Number of planar maps with n edges and without loops or isthmuses.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D Walsh, T. R. S.; Generating nonisomorphic maps without storing them. SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.
%K nonn
%O 2,2
%A _N. J. A. Sloane_.
%E a(9)-a(12) from _Sean A. Irvine_, Mar 29 2017