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A099717
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Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n loops and edges.
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2
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1, 2, 9, 70, 798, 12230, 238979, 5746740, 165778237, 5626476014, 221330040771, 9950747684006
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OFFSET
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0,2
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REFERENCES
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G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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