

A096141


a(n) = sum of n nth powers starting from n^n.


1



1, 13, 216, 4578, 119525, 3729451, 135771160, 5658574916, 265921407297, 13918657338925, 803220053336096, 50674352524725590, 3470170166345203477, 256369124879898560271, 20325382637400264402000
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OFFSET

1,2


LINKS



FORMULA

a(n) = n! * [x^n] exp(n*x)*(exp(n*x)  1)/(exp(x)  1).  Ilya Gutkovskiy, Apr 07 2018


EXAMPLE

a(4) = 4^4 +5^4 + 6^4 +7^4 = 4578.


MATHEMATICA

Table[Total[Range[n, 2n1]^n], {n, 20}] (* Harvey P. Dale, Aug 23 2019 *)


PROG

(PARI) a(n)=sum(k=n, 2*n1, k^n)


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



