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A070285
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n^(n-2) * (n-1)^(n-1).
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0
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1, 12, 432, 32000, 4050000, 784147392, 215886856192, 80244904034304, 38742048900000000, 23579476910000000000, 17665746626579203620864, 15979082092619945289449472, 17171174753799627467382181888
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,2
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COMMENTS
| Number of spanning trees in the bipartite graph K(n,n-1).
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REFERENCES
| J. J. Sylvester, On the change of systems of independent variables, Quarterly Journal of Mathematics, i. (1857), pp. 42-56; Collected Mathematical Papers, Volume 2, Cambridge (1908), pp. 65-85, see page 76.
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MATHEMATICA
| Table[n^(n - 2)*(n - 1)^(n - 1), {n, 2, 15}]
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CROSSREFS
| Cf. A068087.
Sequence in context: A129006 A067429 A054913 * A041617 A159534 A195616
Adjacent sequences: A070282 A070283 A070284 * A070286 A070287 A070288
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KEYWORD
| nonn
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AUTHOR
| Sharon Sela (sharonsela(AT)hotmail.com), May 10 2002
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EXTENSIONS
| Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), May 14 2002
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