login
This site is supported by donations to The OEIS Foundation.

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A099719 Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n arcs. 0
1, 1, 7, 89, 1720, 45887, 1595192, 69438623, 3675895762, 231400961167, 17017734251838, 1441193215057543 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Sequence in context: A069661 A069662 A062747 * A142995 A200832 A103064

Adjacent sequences:  A099716 A099717 A099718 * A099720 A099721 A099722

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 26 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified April 23 14:08 EDT 2014. Contains 240931 sequences.