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%I #6 Feb 02 2021 19:47:37
%S 1,1,1,5,32,343,4505,66603,1045335,17115162,289107854,5007144433,
%T 88516438360,1591949961503,29053438148676,536972307386326,
%U 10034276171127780,189331187319203010,3603141751525175854,69097496637591215442,1334213677527481808220,25922717218623692348237
%N Number of unlabeled 9-gonal 2-trees with n 9-gons.
%H Andrew Howroyd, <a href="/A094653/b094653.txt">Table of n, a(n) for n = 0..200</a>
%H G. Labelle, C. Lamathe and P. Leroux, <a href="http://arXiv.org/abs/math.CO/0312424">Labeled and unlabeled enumeration of k-gonal 2-trees</a>, arXiv:math/0312424 [math.CO], Dec 23 2003.
%Y Column k=9 of A340811.
%Y Cf. A054581.
%K nonn
%O 0,4
%A _Vladeta Jovovic_, Jun 06 2004
%E Terms a(19) and beyond from _Andrew Howroyd_, Feb 02 2021
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