OFFSET
0,2
COMMENTS
There is a closed formula.
LINKS
Z. C. Gao, V. A. Liskovets and N. C. Wormald, Enumeration of unrooted odd-valent regular planar maps, Preprint, 2005.
CROSSREFS
KEYWORD
nonn
AUTHOR
Valery A. Liskovets, Oct 10 2005
STATUS
approved