oo ____ \ ` \ (6*n)! \ ------ / n / 4 /___, n = 1
Sum(factorial(6*n)/4^n, (n, 1, oo))
oo ___ \ ` \ -n / 4 *(6*n)! /__, n = 1
Sum(4^(-n)*factorial(6*n), (n, 1, oo))
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