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A128239 Number of n-node (unlabeled) graphs with girth 6. 1
0, 0, 0, 1, 2, 9, 28, 107, 376, 1457, 5733, 24385, 110240, 540400, 2867847 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,5

LINKS

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

PROG

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

CROSSREFS

Cf. A128041, A128042, A128236-A128243.

Sequence in context: A248437 A002532 A098518 * A307400 A323682 A086511

Adjacent sequences:  A128236 A128237 A128238 * A128240 A128241 A128242

KEYWORD

nonn,more

AUTHOR

Keith Briggs, May 05 2007

EXTENSIONS

Corrected and extended by Martin Fuller, May 01 2015

STATUS

approved

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Last modified May 6 23:41 EDT 2021. Contains 343601 sequences. (Running on oeis4.)