A099685 Consider the family of multigraphs enriched by the species of quaternary sets. Sequence gives number of those multigraphs with 4n loops and edges.

1, 2, 247, 251792, 1078360012, 13649358704657

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..5.

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

Crossrefs

Sequence in context: A065664 A244926 A024031 * A027653 A024349 A012529

Adjacent sequences: A099682 A099683 A099684 * A099686 A099687 A099688

Keyword

nonn

Author

N. J. A. Sloane, Oct 26 2004

Status

approved