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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
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
REFERENCES
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
LINKS
Table of n, a(n) for n=0..10.
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
Adjacent sequences: A099694 A099695 A099696 * A099698 A099699 A099700
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved

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Last modified November 27 11:50 EST 2024. Contains 378151 sequences.
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