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A098625
Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n loops and edges.
3
1, 0, 2, 4, 39, 228, 2400, 23616, 307692, 4197408, 67658769, 1174316570, 22916090131, 482946085932
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: A009834 A106127 A018992 * A057777 A139735 A184952
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved