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A098632
Consider the family of multigraphs enriched by the species of even sets. Sequence gives number of those multigraphs with 2n edges.
0
1, 1, 7, 166, 9367, 991186, 171380452, 44509993711, 16385216984962
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: A020998 A012504 A012689 * A192275 A009807 A220991
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved