Sum $\sum_{i=1}^\infty \frac{-1^{i-1}}{2i-1} $ in a different order
113770
Sum of alternating series $\sum_{i=1}^n \frac{(-1)^{i-1}}{2i-1}$ with accuracy of $\pm .05$.
9610
Find the sum of $\sum\limits_{n=1}^{\infty} \frac{x^{n}}{n(n+1)}$
55339
Find the sum $\sum_{n=1}^{\infty}\frac{ 1}{n^{2}(2n-1)}$
132182
$\sum_{n=1}^\infty \sum_{m=1}^\infty\frac{1}{(m+n)^2}$
93690
How to obtain the sum of the following series? $\sum_{n=1}^\infty{\frac{n^2}{2^n}}$
35036
Series $\sum_{n=1}^{\infty}\frac{\cos(nx)}{n^2}$
52987
$\sum_{n=-\infty}^{\infty}\frac{1}{(n+\alpha)^2}=\frac{\pi^2}{(\sin \pi \alpha)^2}$?
154544
Prove that $ \sum_{n=0}^\infty \frac{z^{2^n}}{1-z^{2^{n+1}}}=\frac{z}{1-z} $
115420
Evaluate $\sum_{n=1}^{\infty} \frac{n}{n^4+n^2+1}$
150148
Sum of $\sum^\infty_{n=2} \frac{1}{\ln{(n!)}}$
29524
Formula for the sum $\sum_{i=2}^{n} \frac1{i^2-1}$
131023
Evaluate the sum: $\sum\limits_{n=0}^{\infty} \frac1{F_{(2^n)}}$
27224
Infinite series $\sum_{k=1}^\infty \frac{k}{2^k}$ and $\sum_{k=1}^\infty \frac{k^2}{2^k}$
104646
Question on simplification of $\sum_{n=1}^{\infty}\frac{2}{(2n+1)(2n+3)}$?
127806
How to find the sum of the series $\sum_{k=2}^\infty \frac{1}{k^2-1}$?
135927
Calculating $\sum_{n=1}^\infty\frac{1}{(n-1)!(n+1)}$
135380
Show that $\sum_{n=1}^\infty \frac{n^2}{(n+1)!}=e-1$