OFFSET
18,1
LINKS
Timothy R. S. Walsh, Alain Giorgetti, Alexander Mednykh, Enumeration of unrooted orientable maps of arbitrary genus by number of edges and vertices, Discrete Math. 312 (2012), no. 17, 2660--2671. MR2935417
CROSSREFS
KEYWORD
nonn
AUTHOR
Alain Giorgetti, Mar 29 2014
STATUS
approved