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A099680
Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n edges.
0
1, 1, 21, 2689, 1162525, 1213162861, 2531581232565
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
REFERENCES
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
LINKS
Table of n, a(n) for n=0..6.
G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]
CROSSREFS
Sequence in context: A225686 A221779 A122801 * A352086 A184367 A114934
Adjacent sequences: A099677 A099678 A099679 * A099681 A099682 A099683
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 26 2004
STATUS
approved

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Last modified October 4 13:56 EDT 2024. Contains 376512 sequences.
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