Finite series with a suprising result.
139842
Seeking a combinatorial proof $\sum\limits _{k=0}^n (n-2k)^2\binom{n}{k}=n\times 2^n$
103606
Proof of sandwich/squeeze theorem for series.
45588
Summing a series with a changing power
49936
Various evaluations of the series $\sum_{n=0}^{\infty} \frac{(-1)^n}{(2n+1)^3}$
84181
Is there a cleaner proof of convergence for this almost-telescoping series
149895
A more convenient Fourier series
87267
Conjecture similar to Fermat's Theorem.
128774
Unexpected result of summation
5433
Finite Sum $\sum\limits_{k=1}^{m-1}\frac{1}{\sin^2\frac{k\pi}{m}}$
79415
The series $\sum_{n=2}^{\infty }\frac{1}{\log (n!)}$
157001
Are there clever ways to evaluate this infinite series?
145007
Two problems on real number series
56007
Does this tricky series converge?
61794
Interesting and unexpected applications of $\pi$
68591
Neat series convergence result
6908
Convergence/Divergence of some series
1148
Curious limit of a sequence used to prove Etemadi's SLLN