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A198318
Number of, not necessarily connected, regular simple graphs on n vertices with girth exactly 8.
5
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 6, 5, 7, 7, 10, 10, 15, 13, 29, 17, 176, 23, 4364, 30, 266398, 39, 20807734, 51
OFFSET
0,25
FORMULA
a(n) = A186748(n) + A210718(n).
a(n) = A185318(n) - A185319(n).
CROSSREFS
Not necessarily connected regular simple graphs girth exactly g: A198313 (g=3), A198314 (g=4), A198315 (g=5), A198316 (g=6), A198317 (g=7), this sequence (g=8).
Sequence in context: A083802 A325691 A326668 * A100881 A053263 A317908
KEYWORD
nonn,more,hard
AUTHOR
Jason Kimberley, Dec 19 2012
STATUS
approved