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A053509
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a(n) = binomial(n-1,4)*n^(n-5).
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6
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0, 0, 0, 0, 1, 30, 735, 17920, 459270, 12600000, 372027810, 11824496640, 403786706895, 14772648450560, 577227041015625, 24013333950627840, 1060372471758165020, 49558656380297379840, 2444960458495625410260, 127008768000000000000000
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OFFSET
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1,6
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REFERENCES
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R. P. Stanley, Enumerative Combinatorics, Cambridge, Vol. 2, 1999; see Prop. 5.3.2.
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LINKS
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FORMULA
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MATHEMATICA
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Table[Binomial[n-1, 4]*n^(n-5), {n, 1, 25}] (* G. C. Greubel, Jan 18 2017 *)
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PROG
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(PARI) vector(25, n, binomial(n-1, 4)*n^(n-5)) \\ G. C. Greubel, Jan 18 2017
(Magma) [Binomial(n-1, 4)*n^(n-5): n in [1..30]]; // G. C. Greubel, Nov 14 2017
(Sage) [binomial(n-1, 4)*n^(n-5) for n in (1..25)] # G. C. Greubel, May 15 2019
(GAP) List([1..25], n-> Binomial(n-1, 4)*n^(n-5)) # G. C. Greubel, May 15 2019
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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