Finding an expression for the sum of n tems of the series $1^2 + 2^2 + 3^2 + ... + n^2$
68124
why is $\sum\limits_{k=1}^{n} k^m$ a polynomial with degree $m+1$ in $n$
10141
Find closed form expression for series expansion coefficients
121554
Finding $\sum\frac{1}{2^n(n+1)}$
136066
Find the sum $\sum _{n=1}^{\infty }\left(\sqrt{n+2}-2\sqrt{n+1}+\sqrt{n}\right)$
123144
Formula : (Exact) Sum of $1^1+2^2+3^3+..+n^n$ (modulo $10^m$) with relatively small $m$
17056
How to find answer to the sum of series $\sum_{n=1}^{\infty}\frac{n}{2^n} $
35036
Series $\sum_{n=1}^{\infty}\frac{\cos(nx)}{n^2}$
107433
Prove the sum to n terms of the series
92754
Closed form for the series: $\sum_{n=1}^{\infty}x^{n^2}$
117843
Finding the sum of series $\sum_{n=0}^∞ \frac{2^n + 3^n}{6^n}$
55339
Find the sum $\sum_{n=1}^{\infty}\frac{ 1}{n^{2}(2n-1)}$
73258
Power series summation
158737
What is the value of the series $\sum\limits_{n=1}^\infty \frac{(-1)^n}{n^2}$?
54604
Evaluate $ \sum_{m > n > 0} \frac{m^2 - n^2}{(m^2 + n^2)^2} $
148143
Find the sum to n terms as well as the sum to infinity of the series:
150928
Summation of a trigonometric series - $\frac{\sin n}{n}$
94943
Sum of series with addition: $\sum_{n=1}^\infty \frac{1}{n^2(n+1)}$