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A128243 Number of n-node (unlabeled) connected graphs with girth 6. 10
0, 0, 0, 1, 1, 6, 17, 69, 239, 962, 3864, 17049, 79607, 403758, 2209386 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,6

LINKS

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

PROG

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

CROSSREFS

Cf. A128041, A128042, A128236-A128242.

Sequence in context: A123189 A219847 A047156 * A219294 A154494 A130278

Adjacent sequences:  A128240 A128241 A128242 * A128244 A128245 A128246

KEYWORD

nonn,more

AUTHOR

Keith M. Briggs, May 05 2007

EXTENSIONS

Corrected and extended by Martin Fuller, May 01 2015

STATUS

approved

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Last modified February 23 05:58 EST 2019. Contains 320411 sequences. (Running on oeis4.)