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A099697
Consider the family of multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n loops and edges.
3
1, 2, 11, 93, 1135, 18567, 387976, 9991794, 308837454, 11225560583, 472141867849
OFFSET
0,2
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: A164893 A355111 A363116 * A346185 A083069 A158837
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved