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URL: https://oeis.org/A128239

⇱ A128239 - OEIS

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A128239
Number of n-node (unlabeled) graphs with girth 6.
3
0, 0, 0, 1, 2, 9, 28, 107, 376, 1457, 5733, 24385, 110240, 540400, 2867847
OFFSET
3,5
PROG
(nauty) geng -tfq $n | countg -qg6 --ng # Martin Fuller, May 03 2015
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Keith Briggs, May 05 2007
EXTENSIONS
Corrected and extended by Martin Fuller, May 01 2015
STATUS
approved