How to compute the sum $\sum_{n=0}^\infty \tfrac{n^2}{2^n}$?
7686
How to prove $\sum_{n=0}^{\infty} \frac{n^2}{2^n} = 6$?
84147
Evaluating $\sum_{n=1}^\infty \frac{2^{2n-1}}{5^{n+1}}$
152227
How to sum this series to infinity: $\sum_{n=0}^{\infty} \frac1{2^{2^n}}$
127806
How to find the sum of the series $\sum_{k=2}^\infty \frac{1}{k^2-1}$?
65653
Find a closed form of the series $\sum_{n=0}^{\infty} n^2x^n$
92810
What is $\sum_{r=1}^\infty\frac{r+2}{2^{r+1}(r)(r+1)}$?
94943
Sum of series with addition: $\sum_{n=1}^\infty \frac{1}{n^2(n+1)}$
102339
How to compute the sum of a series
142985
Finding sum of series $\sum^{\infty}_{k=0}\frac{(k+1)(k+2)}{2^k}$
90030
What would be the value of $\sum\limits_{n=0}^\infty \frac{1}{an^2+bn+c}$
17056
How to find answer to the sum of series $\sum_{n=1}^{\infty}\frac{n}{2^n} $
137155
Sum $ \sum\limits_{k=1}^{\infty} \frac{k^2}{2^k}$
131023
Evaluate the sum: $\sum\limits_{n=0}^{\infty} \frac1{F_{(2^n)}}$
67731
Calculate the sum of infinite series with general term $\frac{n^2}{2^n}$.
127267
Evaluation of $\sum_{n=1}^{\infty}\frac{1}{n(2n+1)}=2-2\ln(2)$
45440
$\sum_{n=2}^\infty \frac{1}{(\ln\, n)^2}$ c0nvergence
10460
Why does $\sum_{n = 0}^\infty \frac{n}{2^n}$ converge to 2?