A185237 Number of disconnected 3-regular simple graphs on 2n vertices with girth at least 7.

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

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