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A098624 Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n edges. 0
1, 0, 1, 2, 15, 84, 750, 6852, 79639, 1006184, 14875218, 241078100, 4392257716, 87279581232 (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: A178750 A108475 A328007 * A116079 A153445 A208974

Adjacent sequences:  A098621 A098622 A098623 * A098625 A098626 A098627

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified April 3 23:48 EDT 2020. Contains 333207 sequences. (Running on oeis4.)