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A165655
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Number of disconnected 5-regular (quintic) graphs on 2n vertices.
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8
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0, 0, 0, 0, 0, 0, 1, 3, 66, 8029, 3484760, 2595985770, 2815099031417
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,8
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LINKS
| N. J. A. Sloane, Transforms
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FORMULA
| a = A165626 - A006821 = Euler_transformation(A006821) - A006821.
a(n)=A068933(2n,5).
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CROSSREFS
| 5-regular simple graphs: A006821 (connected), this sequence (disconnected), A165626 (not necessarily connected).
Disconnected regular simple graphs: A068932 (any degree), A068933 (triangular array), specified degree k: A157928 (k=0), A157928 (k=1), A165652 (k=2), A165653 (k=3), A033483 (k=4), this sequence (k=5), A165656 (k=6), A165877 (k=7), A165878 (k=8).
Sequence in context: A157984 A187547 A157554 * A157576 A105443 A065425
Adjacent sequences: A165652 A165653 A165654 * A165656 A165657 A165658
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KEYWORD
| nonn,hard,more
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AUTHOR
| Jason Kimberley (Jason.Kimberley(AT)newcastle.edu.au), Sep 28 2009
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