%I
%S 4,12,42,152,562,2108,7986,30476,116950,450756,1743470,6763152,
%T 26299104,102478208,400032822,1563985172,6122945694,23999991452,
%U 94173327894,369881810616,1454036828992,5720448937528,22521468585822,88725551176384
%N Number of threechoice polygons by halfperimeter
%C Generating function is the solution of a Fuchsian ODE of order 8.
%D A. R. Conway, A. J. Guttmann and M. Delest, Math. Comput. Modelling, 26 (1997), 5158.
%D A. J. Guttmann and I. Jensen. Sem. Lothar. Combin., 54 (2006), B54c (14pp).
%K nonn
%O 2,1
%A Iwan Jensen (I.Jensen(AT)ms.unimelb.edu.au), Feb 17 2010
