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A070285 n^(n-2) * (n-1)^(n-1). +0
1
1, 12, 432, 32000, 4050000, 784147392, 215886856192, 80244904034304, 38742048900000000, 23579476910000000000, 17665746626579203620864, 15979082092619945289449472, 17171174753799627467382181888 (list; graph; listen)
OFFSET

2,2

COMMENT

Number of spanning trees in the bipartite graph K(n,n-1).

MATHEMATICA

Table[n^(n - 2)*(n - 1)^(n - 1), {n, 2, 15}]

CROSSREFS

Cf. A068087.

Sequence in context: A129006 A067429 A054913 this_sequence A041617 A159534 A126603

Adjacent sequences: A070282 A070283 A070284 this_sequence A070286 A070287 A070288

KEYWORD

nonn

AUTHOR

Sharon Sela (sharonsela(AT)hotmail.com), May 10 2002

EXTENSIONS

Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), May 14 2002

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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