Finding a formula for a given series.
48446
Summation involving a factorial: $1 + \sum_{j=1}^{n} j!j$
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
90696
Series in Real Analysis
61547
Derive an explicit formula for a power series $\sum_{n=1}^\infty n^2x^n$
101202
Infinite Geometric Series Formula Derivation
67731
Calculate the sum of infinite series with general term $\frac{n^2}{2^n}$.
154311
Proving convergence of a series and then finding limit
58262
Find the sum of the series $1+\frac{1}{3}\cdot\frac{1}{4}+\frac{1}{5}\cdot\frac{1}{4^2}+\frac{1}{7}\cdot\frac{1}{4^3}+\cdots$
129860
Find a formula for this sequence (and prove it).
134610
Find the sum of finite series $S=\sum_{k=1}^{2015}{(-1)^{\frac{k(k+1)}{2}}}k$
22657
How to find the sum of the infinite series?
70841
A simple series $\sum_{i=1}^\infty \frac{i}{2^i} = 2$
10141
Find closed form expression for series expansion coefficients
147005
Prove two identities relating to series
77519
I'm searching for the formula of the series $ \sum_{n=0}^{\infty}a^{n^l} $
8905
Sum the series $\frac{3}{1⋅2⋅4}+\frac{4}{2⋅3⋅5}+ \frac{5}{3⋅4⋅6}+...\text{(upto n terms)}$
117843
Finding the sum of series $\sum_{n=0}^∞ \frac{2^n + 3^n}{6^n}$