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A210718 Number of disconnected regular simple graphs on n vertices with girth exactly 8. 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 7, 7, 9, 10, 12, 13, 16, 17, 21, 23, 27, 30, 36, 39, 46, 51, 60, 66, 77, 85, 99, 110, 126, 140, 162, 179, 205, 228, 261, 289, 329, 365, 416, 461, 524, 579, 669, 726, 976, 909, 5378, 1134 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,25

LINKS

Jason Kimberley, Table of n, a(n) for n = 0..77

Jason Kimberley, Index of sequences counting disconnected k-regular simple graphs with girth exactly g

FORMULA

a(n) = A185218(n) - A185219(n).

CROSSREFS

Sequence in context: A025151 A026801 A185328 * A027191 A122522 A227614

Adjacent sequences:  A210715 A210716 A210717 * A210719 A210720 A210721

KEYWORD

nonn,hard

AUTHOR

Jason Kimberley, Dec 19 2012

STATUS

approved

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Last modified June 20 03:20 EDT 2021. Contains 345157 sequences. (Running on oeis4.)