OFFSET
1,2
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..250
FORMULA
a(n) = (n^(n+1)*(n^2-n-1) + n)/(n-1)^2 for n>1. - Dean Hickerson, Jun 26, 2001
a(n) = n * A068475(n). - Reinhard Zumkeller, Nov 22 2014
MATHEMATICA
Sum[i*n^i, {i, 1, n}]
PROG
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Olivier Gérard, Jun 23 2001
STATUS
approved