%I #8 Jul 30 2013 18:36:18
%S 1,0,420,37520,3656520,454406400,67651907400,11713973686800,
%T 2309360318565300,509886615053415600,124470953623133617500,
%U 33253861507512510664800,9642802738009988846098800
%N Number of labeled non-planar 2-connected K_{3,3}-free toroidal irreducible graphs having n vertices.
%D A. Gagarin, G. Labelle and P. Leroux, The structure of K_{3,3}-subdivision-free toroidal graphs, Discrete Math., 307 (2007), 2993-3005.
%H A. Gagarin et al., <a href="/A135380/b135380.txt">Table of n, a(n) for n = 5..20</a>
%K nonn
%O 5,3
%A _N. J. A. Sloane_, Dec 10 2007