OFFSET
0,5
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).
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 27 2012
STATUS
approved