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A099697 Consider the family of multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n loops and edges. 0
1, 2, 11, 93, 1135, 18567, 387976, 9991794, 308837454, 11225560583, 472141867849 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

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

LINKS

Table of n, a(n) for n=0..10.

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

CROSSREFS

Sequence in context: A005366 A068392 A164893 * A083069 A158837 A236962

Adjacent sequences:  A099694 A099695 A099696 * A099698 A099699 A099700

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

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Last modified February 20 00:28 EST 2019. Contains 320329 sequences. (Running on oeis4.)