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A099705
Consider the family of multigraphs enriched by the species of directed graphs. Sequence gives number of those multigraphs with n loops and edges.
2
1, 4, 60, 2040, 188080, 74164384, 140677401088, 1132868741554944, 36957109369822385664, 4838033391155896811513344
(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..9.
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]
CROSSREFS
Sequence in context: A013502 A303286 A322450 * A012488 A374887 A181444
Adjacent sequences: A099702 A099703 A099704 * A099706 A099707 A099708
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved

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Last modified November 7 10:03 EST 2024. Contains 377533 sequences.
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