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A185215 Number of disconnected regular simple graphs on n vertices with girth at least 5. 7
0, 0, 1, 1, 2, 1, 2, 1, 2, 1, 3, 2, 4, 3, 5, 5, 7, 7, 10, 10, 15, 15, 21, 21, 39, 30, 104, 42, 649, 58, 7206, 80, 107922, 110, 1876839, 150, 35925339, 202, 741413459, 274, 16356258638, 511, 383936223872, 133225 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..43.

Jason Kimberley, Disconnected regular graphs with girth at least 5

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

CROSSREFS

Sequence in context: A161055 A161259 A161284 * A259551 A058232 A216320

Adjacent sequences:  A185212 A185213 A185214 * A185216 A185217 A185218

KEYWORD

nonn,hard

AUTHOR

Jason Kimberley, Jun 16 2012

STATUS

approved

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Last modified February 23 07:24 EST 2020. Contains 332159 sequences. (Running on oeis4.)