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

Author

Jason Kimberley, Jan 26 2012

Keywords

• nonn
• hard
• more

Links

• 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).

Extensions

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