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A185216
Number of disconnected regular simple graphs on n vertices with girth at least 6.
10
0, 0, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 2, 4, 3, 5, 4, 7, 6, 9, 9, 12, 12, 17, 17, 22, 24, 31, 32, 42, 44, 60, 60, 109, 80, 529, 107, 8246, 143, 191422, 188, 4856141, 248, 127938143, 326, 3482858640, 424, 98176518751, 552
OFFSET
0,5
CROSSREFS
Disconnected k-regular simple graphs with girth at least 6: this sequence (all k), A185206 (triangle); A185226 (k=2), A185236 (k=3), A185246 (k=4).
Disconnected regular graphs with girth at least g: A068932 (g=3), A185214 (g=4), A185215 (g=5), this sequence (g=6), A185217 (g=7).
Sequence in context: A161057 A161261 A161286 * A247976 A280986 A344773
KEYWORD
nonn,hard
AUTHOR
Jason Kimberley, Jun 21 2012
STATUS
approved