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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, 2084120446, 28125888087, 434318629496, 7657513894860
(list; graph; refs; listen; history; text; internal format)
OFFSET
3,5
LINKS
Table of n, a(n) for n=3..21.
PROG
(nauty) geng -ctfq $n | countg -qg5 --ng # Martin Fuller, May 03 2015
CROSSREFS
Cf. A128041, A128042.
Cf. A128236, A128237, A128238, A128239, A128240, A128241, A128243.
Sequence in context: A349568 A026525 A007043 * A323934 A166932 A027105
Adjacent sequences: A128239 A128240 A128241 * A128243 A128244 A128245
KEYWORD
nonn,more
AUTHOR
Keith Briggs, May 05 2007
EXTENSIONS
Corrected and extended by Martin Fuller, May 01 2015
a(18)-a(21) added by Georg Grasegger, May 02 2023
STATUS
approved

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Last modified May 21 20:59 EDT 2026. Contains 395806 sequences.
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