A185274 Number of disconnected 7-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, 1, 1, 9, 749, 2888270

Offset

0,17

Links

Table of n, a(n) for n=0..18.

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), this sequence (k=7), A185284 (k=8), A185294 (k=9).

Sequence in context: A234611 A015481 A229930 * A246122 A145183 A124417

Adjacent sequences: A185271 A185272 A185273 * A185275 A185276 A185277

Keyword

nonn,more,hard

Author

Jason Kimberley, Feb 22 2011

Status

approved