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A096141
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a(n) = sum of n n-th powers starting from n^n.
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1
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1, 13, 216, 4578, 119525, 3729451, 135771160, 5658574916, 265921407297, 13918657338925, 803220053336096, 50674352524725590, 3470170166345203477, 256369124879898560271, 20325382637400264402000
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = n! * [x^n] exp(n*x)*(exp(n*x) - 1)/(exp(x) - 1). - Ilya Gutkovskiy, Apr 07 2018
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EXAMPLE
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a(4) = 4^4 +5^4 + 6^4 +7^4 = 4578.
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MATHEMATICA
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Table[Total[Range[n, 2n-1]^n], {n, 20}] (* Harvey P. Dale, Aug 23 2019 *)
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PROG
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(PARI) a(n)=sum(k=n, 2*n-1, k^n)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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