%I #12 Mar 04 2018 10:22:18

%S 0,0,0,5,64,655,5858,51369,448982,3967466,35603366,324990677,

%T 3016738988,28449849867,272233685444,2639649712580,25902435997188

%N Number of chiral planar maps on n nodes up to orientation-preserving isomorphisms.

%H V. A. Liskovets, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL3/LISK/Derseq.html">Some easily derivable sequences</a>, J. Integer Sequences, 3 (2000), #00.2.2.

%F a(n) = A006385(n)-A054936(n). - R. J. Mathar, Oct 01 2011

%K nonn,easy

%O 1,4

%A _N. J. A. Sloane_, May 24 2000