|
| |
|
|
A123485
|
|
Number of n-node labeled trivalent (or cubic) graphs with connectivity 2.
|
|
1
| |
|
|
0, 0, 0, 2520, 1814400, 1888563600, 2979953776800, 6935468956416000, 23019567930463104000, 105689740661883810432000, 653795414851090462030080000, 5326203537908913517889391360000
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,4
|
|
|
REFERENCES
| R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1977.
|
|
|
LINKS
| R. W. Robinson, Table of n, a(n) for n = 1..30
|
|
|
CROSSREFS
| Sequence in context: A109480 A066599 A107531 * A172553 A172580 A172684
Adjacent sequences: A123482 A123483 A123484 * A123486 A123487 A123488
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 13 2006
|
| |
|
|
