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A123485
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Number of n-node labeled trivalent (or cubic) graphs with connectivity 2.
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1
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0, 0, 0, 2520, 1814400, 1888563600, 2979953776800, 6935468956416000, 23019567930463104000, 105689740661883810432000, 653795414851090462030080000, 5326203537908913517889391360000
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OFFSET
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1,4
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REFERENCES
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R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1977.
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LINKS
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R. W. Robinson, Table of n, a(n) for n = 1..30
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CROSSREFS
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Sequence in context: A109480 A066599 A107531 * A282433 A228080 A172553
Adjacent sequences: A123482 A123483 A123484 * A123486 A123487 A123488
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane, Nov 13 2006
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STATUS
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approved
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