OFFSET
1,3
FORMULA
a(n) ~ (1 - log(2)) * n^2. - Vaclav Kotesovec, May 28 2021
MAPLE
A153817 := proc(n) add(floor(n*k/(n+k)), k=1..n) ; end: seq(A153817(n), n=1..100) ; # R. J. Mathar, Feb 21 2009
MATHEMATICA
Table[Sum[Floor[n*k/(n + k)], {k, 1, n}], {n, 1, 100}] (* Vaclav Kotesovec, May 28 2021 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Ctibor O. Zizka, Jan 02 2009
EXTENSIONS
More terms from R. J. Mathar, Feb 21 2009
STATUS
approved