A185294 Number of disconnected 9-regular simple graphs on 2n vertices with girth at least 4.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 15

Offset

0,21

Links

Table of n, a(n) for n=0..20.

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 4: A185214 (any k), A185204 (triangle); specified degree k: A185224 (k=2), A185234 (k=3), A185244 (k=4), A185254 (k=5), A185264 (k=6), A185274 (k=7), A185284 (k=8), this sequence (k=9).

Sequence in context: A123652 A127622 A290483 * A287285 A324677 A324675

Adjacent sequences: A185291 A185292 A185293 * A185295 A185296 A185297

Keyword

nonn,more,hard

Author

Jason Kimberley, Feb 22 2011

Status

approved