How to determine the sum of an infinite series that is neither arithmetic nor geometric?
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
93690
How to obtain the sum of the following series? $\sum_{n=1}^\infty{\frac{n^2}{2^n}}$
127189
sum of this series: $\sum_{n=1}^{\infty}\frac{1}{4n^2-1}$
77519
I'm searching for the formula of the series $ \sum_{n=0}^{\infty}a^{n^l} $
35036
Series $\sum_{n=1}^{\infty}\frac{\cos(nx)}{n^2}$
19899
infinite series of the form $\sum\limits_{k=1}^{\infty}\frac{1}{a^{k}+1}$
27224
Infinite series $\sum_{k=1}^\infty \frac{k}{2^k}$ and $\sum_{k=1}^\infty \frac{k^2}{2^k}$
134610
Find the sum of finite series $S=\sum_{k=1}^{2015}{(-1)^{\frac{k(k+1)}{2}}}k$
17214
Transfinite series: Uncountable sums
102339
How to compute the sum of a series
118436
Identifying the series $\sum\limits_{k=-\infty}^{\infty} 2^k x^{2^k}$
70841
A simple series $\sum_{i=1}^\infty \frac{i}{2^i} = 2$
112950
Find the value of infinite series $\sum_{n=1}^{\infty} \tan^{-1}(2/n^2)$
29170
Find the sum of the series $\sum \frac{1}{n(n+1)(n+2)}$
44754
Infinite Series $\sum\limits_{n=1}^{\infty}\frac{1}{4^n\cos^2\frac{x}{2^n}}$
125981
Closed-Form Solution to Infinite Sum
117843
Finding the sum of series $\sum_{n=0}^∞ \frac{2^n + 3^n}{6^n}$