A185237 - OEIS

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A185237

Number of disconnected 3-regular simple graphs on 2n vertices with girth at least 7.

5

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 27, 609, 32237, 1885410, 101214662, 5025320937

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,26

LINKS

Table of n, a(n) for n=0..31.

Jason Kimberley, Index of sequences counting disconnected k-regular simple graphs with girth at least g

CROSSREFS

Disconnected k-regular simple graphs with girth at least 7: A185217 (all k), A185207 (triangle); A185227 (k=2), this sequence (k=3).

Sequence in context: A222844 A219345 A185037 * A099084 A085656 A113100

Adjacent sequences: A185234 A185235 A185236 * A185238 A185239 A185240

KEYWORD

nonn,hard,more

AUTHOR

Jason Kimberley, Feb 22 2011

STATUS

approved