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%I M1277 #20 Feb 26 2024 14:15:37
%S 2,4,14,47,184,761,3314,14997,69886,333884,1626998,8067786,40580084,
%T 206734083,1064666724,5536480877,29036188788,153450351924,816503772830
%N Number of connected planar maps with n edges.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H Wormald, Nicholas C. <a href="http://dx.doi.org/10.1016/0012-365X(81)90238-7">Counting unrooted planar maps</a>, Discrete Math. 36 (1981), no. 2, 205-225.
%H T. R. S. Walsh, <a href="/A007401/a007401.pdf">Number of sensed planar maps with n edges and m vertices</a>
%Y Cf. A054936.
%K nonn,nice
%O 1,1
%A _N. J. A. Sloane_
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