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A098627 Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n arcs. 0
1, 0, 1, 2, 27, 164, 2335, 25458, 437241, 6965112, 145640817, 3057675290, 76814951587, 2003471245164 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.

LINKS

Table of n, a(n) for n=0..13.

G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]

CROSSREFS

Sequence in context: A041801 A166942 A119351 * A263930 A051766 A058406

Adjacent sequences:  A098624 A098625 A098626 * A098628 A098629 A098630

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified February 26 21:58 EST 2020. Contains 332295 sequences. (Running on oeis4.)