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A128242 Number of n-node (unlabeled) connected graphs with girth 5. 3
0, 0, 1, 1, 5, 16, 66, 266, 1235, 6350, 37364, 251106, 1942085, 17287710, 177086792 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,5

LINKS

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

PROG

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

CROSSREFS

Cf. A128041, A128042, A128236-A128243.

Sequence in context: A301958 A026525 A007043 * A323934 A166932 A027105

Adjacent sequences:  A128239 A128240 A128241 * A128243 A128244 A128245

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 20 12:57 EST 2019. Contains 320327 sequences. (Running on oeis4.)