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Number of unsensed planar maps with n edges and without loops.
(Formerly M1464)
1

%I M1464 #15 Mar 29 2017 14:41:24

%S 1,2,5,14,45,191,871,4682,27336,172706,1150322,7989004

%N Number of unsensed planar maps with n edges and without loops.

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

%H Timothy R. Walsh, <a href="http://dx.doi.org/10.1137/0604018">Generating nonisomorphic maps without storing them</a>, SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.

%K nonn

%O 1,2

%A _N. J. A. Sloane_.

%E a(8)-a(12) from _Sean A. Irvine_, Mar 29 2017