100 ____ \ ` \ 2 \ (1 - n) ) -------- / n / 2 /___, n = 1
Sum((1 - n)^2/2^n, (n, 1, 100))
3802951800684688204490109605925 ------------------------------- 1267650600228229401496703205376
3802951800684688204490109605925/1267650600228229401496703205376
x^n/n
(x-1)^n
1/2^(n!)
n^2/n!
x^n/n!
k!/(n!*(n+k)!)
csc(n)^2/n^3
1/n^2
1/n^4
1/n^6
1/n
(-1)^n
(-1)^(n + 1)/n
(n + 2)*(-1)^(n - 1)
(3*n - 1)/(-5)^n
(-1)^(n - 1)*n/(6*n - 5)
(-1)^(n + 1)/n*x^n
(3*n - 1)/(-5)^n