OFFSET
0,3
LINKS
Didier Arquès and Alain Giorgetti, Counting rooted maps on a surface, Theoret. Comput. Sci. 234 (2000), no. 1-2, 255--272. MR1745078 (2001f:05078).
EXAMPLE
Triangle begins:
0;
0, 41;
0, 690, 16925;
0, 7150, 237652, 4306778;
0, 58760, 2518957, 56864524, 910734615;
0, 420182, 22417804, 613687758, 11675167470, 174833737848;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Jul 27 2012
STATUS
approved