%I #3 Mar 30 2012 16:50:41
%S 0,298,7044,64820,356293,1429448,4644258
%N Number of n-node triangulations of the double torus S_2 in which every node has degree >= 6.
%D M. Jungerman and G. Ringel, Minimal triangulations on orientable surfaces, Acta Math. 145 (1980), 121-154.
%H Thom Sulanke, <a href="http://hep.physics.indiana.edu/~tsulanke/graphs/surftri/">Generating triangulations of surfaces (surftri)</a>, (also subpages).
%K nonn
%O 9,2
%A _N. J. A. Sloane_, May 12 2007