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A081133
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a(n) = n^n*binomial(n+2, 2).
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7
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1, 3, 24, 270, 3840, 65625, 1306368, 29647548, 754974720, 21308126895, 660000000000, 22254310307658, 811365140791296, 31801886192186565, 1333440819066961920, 59553569091796875000, 2822351843277561397248
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n) = n^n*(n+1)*(n+2)/2.
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MAPLE
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MATHEMATICA
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Join[{1}, Table[n^n Binomial[n+2, 2], {n, 20}]] (* Harvey P. Dale, Dec 27 2011 *)
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PROG
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(Sage) [n^n*binomial(n+2, 2) for n in (0..20)] # G. C. Greubel, May 18 2021
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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