Find the sum of the series $1+\frac{1}{3^2}+\frac{1.4.1}{1.2.3^4}+\frac{1.4.7.1}{1.2.3.3^6}+...$
23576
Calculating $1+\frac13+\frac{1\cdot3}{3\cdot6}+\frac{1\cdot3\cdot5}{3\cdot6\cdot9}+\frac{1\cdot3\cdot5\cdot7}{3\cdot6\cdot9\cdot12}+\dots? $
100896
What is the sum of this? $ 1 + \frac12 + \frac13 + \frac14 + \frac16 + \frac18 + \frac19 + \frac1{12} +\cdots$
71824
Finding the sum of the series $\frac{1}{1!}+\frac{1+2}{2!}+\frac{1+2+3}{3!}+ \ldots$
81596
Series expansion at $x=0$ of $\frac{3x}{1+x^2 + x^4}$
36951
How to evaluate the series $1+\frac34+\frac{3\cdot5}{4\cdot8}+\frac{3\cdot5\cdot7}{4\cdot8\cdot12}+\cdots$
4816
How to solve $\frac 1{1.2.3}+\frac 1{2.3.4}+\frac 1{3.4.5}+...$
32637
What is the sum of this series: $\displaystyle\sum_{n=0}^{\infty} \dfrac{a^n}{(3n)!}$
150928
Summation of a trigonometric series - $\frac{\sin n}{n}$
113713
Closed formula for the sum of the following series
139221
Compute the series $\sum_{n=1}^{+\infty} \frac{1}{n^3\sin(n\pi\sqrt{2})}.$
52241
Calculate sum of series $\sum \frac{n^2}{n!}$
18814
Sum of the series $1+\frac{1\cdot 3}{6}+\frac{1\cdot3\cdot5}{6\cdot8}+\cdots$
148143
Find the sum to n terms as well as the sum to infinity of the series:
47706
Find the value of $ \sum_{n=1}^{\infty} \frac{n^3}{3^n} $
127806
How to find the sum of the series $\sum_{k=2}^\infty \frac{1}{k^2-1}$?
33986
Calculate $\sum_{n=1}^{\infty}(\frac{1}{2n}-\frac{1}{n+1}+\frac{1}{2n+4})$
117843
Finding the sum of series $\sum_{n=0}^∞ \frac{2^n + 3^n}{6^n}$