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%I #18 Jan 14 2025 19:13:28
%S 0,0,0,0,5,64,655,5858,51369,448982,3967466,35603366,324990677,
%T 3016738988,28449849867,272233685444,2639649712580,25902435997188
%N Number of chiral pairs of planar maps with n edges.
%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) - A006443(n). - _R. J. Mathar_, Oct 01 2011
%Y Cf. A006384, A006385, A006443.
%K nonn,easy
%O 0,5
%A _N. J. A. Sloane_, May 24 2000
%E a(0)=0 prepended by _Andrew Howroyd_, Jan 13 2025