A185213 Number of disconnected 11-regular graphs with 2n nodes.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 13, 8037887, 945095928322681, 187549741420313256356540, 66398446859255608487987488813721, 43100445877221052008718432480116589483823

Offset

0,14

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

11-regular simple graphs: A014384 (connected), this sequence (disconnected).

Disconnected regular simple graphs: A068932 (any degree), A068933 (triangular array), specified degree k: A165652 (k=2), A165653 (k=3), A033483 (k=4), A165655 (k=5), A165656 (k=6), A165877 (k=7), A165878 (k=8), A185293 (k=9), A185203 (k=10), this sequence (k=11).

Sequence in context: A128669 A013866 A014384 * A034248 A324270 A351238

Adjacent sequences: A185210 A185211 A185212 * A185214 A185215 A185216

Keyword

nonn,hard,more

Author

Jason Kimberley, Jan 26 2012

Extensions

a(15)-a(18) from Andrew Howroyd, May 20 2020

Status

approved