Summation of factorial series
91933
Evaluate $\sum_{k=1}^nk\cdot k!$
59253
Summing the power series $\sum\limits_{n=0}^\infty (-1)^n \frac{x^{2n+1}}{2n+1}\prod\limits_{k=1}^n\frac{2k-1}{2k} $
58262
Find the sum of the series $1+\frac{1}{3}\cdot\frac{1}{4}+\frac{1}{5}\cdot\frac{1}{4^2}+\frac{1}{7}\cdot\frac{1}{4^3}+\cdots$
70018
Sum of series (telescoping)
112036
sum of series $\frac{n}{1\cdot 2 \cdot 3}+\frac{n-1}{2\cdot 3\cdot 4}+\frac{n-2}{3\cdot 4 \cdot 5}+\cdots \cdots n$ terms
18796
How to find the sum of the series $1+\frac{1}{2}+ \frac{1}{3}+\frac{1}{4}+\dots+\frac{1}{n}$?
133420
Computing the binomial series: $\binom{n}{2}\cdot2^2+\binom{n}{4}\cdot2^4+\binom{n}{6}\cdot2^6+\cdots+ \binom{n}{n}\cdot2^n$
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
100566
Ramanujan's approximation to factorial
38741
Finding a general formula for summation
44649
Summing a series having a geometric component
22636
Find the sum of the series $\sum \limits_{n=1}^{\infty} \frac{2^{-n}(n+3)}{(n+1)(n+2)}$
133073
Evaluating series with factorial denominator (sanity check).
127189
sum of this series: $\sum_{n=1}^{\infty}\frac{1}{4n^2-1}$
130083
Evaluating sum of a combination series
113633
sum of series using mean value theorem
146305
Simplify sum of factorials with mathematical induction