A128239 Number of n-node (unlabeled) graphs with girth 6.

0, 0, 0, 1, 2, 9, 28, 107, 376, 1457, 5733, 24385, 110240, 540400, 2867847

Offset: 3

Author

Keith Briggs, May 05 2007

Keywords

• nonn
• more

Crossrefs

Cf. A128041, A128042, A128236-A128243.

Programs

nauty

geng -tfq $n | countg -qg6 --ng # Martin Fuller, May 03 2015

Extensions

Corrected and extended by Martin Fuller, May 01 2015