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%I #6 Feb 02 2021 19:48:13
%S 1,1,1,7,55,840,15189,309607,6671842,149850849,3471296793,82442359291,
%T 1998559329142,49290785442796,1233639304644946,31268489727956101,
%U 801335133177932829,20736286803363051714,541224489038545084067,14234799536039481373552,376974819516101224941091
%N Number of unlabeled 12-gonal 2-trees with n 12-gons.
%H Andrew Howroyd, <a href="/A094656/b094656.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=12 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