login
A098635
Consider the family of multigraphs enriched by the species of even sets. Sequence gives number of those multigraphs with 2n arcs.
0
1, 1, 19, 1111, 141289, 32283361, 11841596779, 6461678187511, 4966364015391889
OFFSET
0,3
REFERENCES
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
LINKS
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]
CROSSREFS
Sequence in context: A195214 A213864 A217827 * A217828 A217829 A063442
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved