What is represented by $\sum_{n=1}^{\infty} n^2 x^{n-1}$?
138456
How to fit $\sum{n^{2}x^{n}}$ into a generating function?
79415
The series $\sum_{n=2}^{\infty }\frac{1}{\log (n!)}$
116723
Evaluating the sum $\sum_{n=1}^{\infty}\dfrac{(-1)^{n}}{n^{2}}$
151477
computing the series $\sum_{n=1}^\infty \frac{1}{n^2 2^n}$
9610
Find the sum of $\sum\limits_{n=1}^{\infty} \frac{x^{n}}{n(n+1)}$
91784
Calculating $\sum_{n=1}^\infty {\frac{1}{2^nn(3n-1)}}$
132182
$\sum_{n=1}^\infty \sum_{m=1}^\infty\frac{1}{(m+n)^2}$
127189
sum of this series: $\sum_{n=1}^{\infty}\frac{1}{4n^2-1}$
6416
How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?
125148
Summation of series $\sum_{k=0}^\infty 2^k/\binom{2k+1}{k}$
104646
Question on simplification of $\sum_{n=1}^{\infty}\frac{2}{(2n+1)(2n+3)}$?
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
4253
How to calculate: $\sum_{n=1}^{\infty} n a^n$
118456
Find $\sum_{n=1}^{\infty}\tan^{-1}\frac{2}{n^2}$
67271
$\sum_{n=-\infty}^{\infty}\frac{1}{(u +n)^2}=\frac{\pi^2}{(\sin \pi u)^2}$
135927
Calculating $\sum_{n=1}^\infty\frac{1}{(n-1)!(n+1)}$
127267
Evaluation of $\sum_{n=1}^{\infty}\frac{1}{n(2n+1)}=2-2\ln(2)$