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A287890 Unrooted labeled 4-cactus graphs on 3n+1 nodes. 0
0, 3, 630, 756000, 2740537800, 22317642547200, 344030189461358400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..6.

Maryam Bahrani and Jérémie Lumbroso, Enumerations, Forbidden Subgraph Characterizations, and the Split-Decomposition, arXiv:1608.01465 [math.CO], 2016.

CROSSREFS

Sequence in context: A140029 A161964 A229688 * A091261 A230808 A158600

Adjacent sequences:  A287887 A287888 A287889 * A287891 A287892 A287893

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 21 2017

STATUS

approved

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Last modified April 22 08:25 EDT 2019. Contains 322329 sequences. (Running on oeis4.)