11 ____ \ ` \ (n + 2)! \ ------------------------ / 2 2 / (2*n)!*(n + 1) *(n + 3) /___, n = 1
Sum(factorial(n + 2)/(((factorial(2*n)*(n + 1)^2)*(n + 3)^2)), (n, 1, 11))
209745744772909178569 ---------------------- 4062950408491669094400
209745744772909178569/4062950408491669094400
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