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A099704 Consider the family of multigraphs enriched by the species of directed graphs. Sequence gives number of those multigraphs with n edges. 0
1, 2, 24, 776, 79840, 35397440, 69619053504, 564929183555840, 18464894708236907776, 2418517115222622481308160 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

G. Paquin, D\'enombrement de multigraphes enrichis, M\'emoire, Math. Dept., Univ. Qu\'ebec \`a Montr\'eal, 2004.

CROSSREFS

Sequence in context: A177771 A009396 A012128 * A172492 A012186 A012081

Adjacent sequences:  A099701 A099702 A099703 * A099705 A099706 A099707

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Oct 26 2004

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Last modified February 14 17:27 EST 2012. Contains 205644 sequences.