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A128238 Number of n-node (unlabeled) graphs with girth 5. 1
0, 0, 1, 2, 8, 26, 101, 396, 1744, 8531, 47803, 308086, 2300756, 19909540, 199365557 (list; graph; refs; listen; history; text; internal format)
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

AUTHOR

Keith Briggs, May 05 2007

EXTENSIONS

Corrected and extended by Martin Fuller, May 01 2015

STATUS

approved

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Last modified February 3 17:00 EST 2023. Contains 360044 sequences. (Running on oeis4.)