A128238 Number of n-node (unlabeled) graphs with girth 5.

0, 0, 1, 2, 8, 26, 101, 396, 1744, 8531, 47803, 308086, 2300756, 19909540, 199365557

Offset

3,4

Links

Table of n, a(n) for n=3..17.

Prog

(nauty) geng -tfq $n | countg -qg5 --ng # Martin Fuller, May 03 2015

Crossrefs

Cf. A128041, A128042, A128236-A128243.

Sequence in context: A357221 A281345 A348240 * A110156 A295934 A187151

Adjacent sequences: A128235 A128236 A128237 * A128239 A128240 A128241

Keyword

nonn,more

Author

Keith Briggs, May 05 2007

Extensions

Corrected and extended by Martin Fuller, May 01 2015

Status

approved