Riemann Zeta function's analytic continuation relationship with simple closed formulas
104197
Connection between Faulhauber's formula and Riemann zeta function
79117
Proof that the harmonic series diverges (without improper integrals)
13035
The set of functions which map convergent series to convergent series
141390
Closed form for $\sum_{n=-\infty}^\infty \frac{1}{(z+n)^2+a^2}$
144772
Is there a recurrence relation which has no closed formula?
21805
Scattering, Perturbation and asymptotic states in LSZ reduction formula
110262
Finding a closed formula for $1\cdot2\cdot3\cdots k +\dots + n(n+1)(n+2)\cdots(k+n-1)$
119606
Closed form of summation
19633
Closed form for a pair of continued fractions
113713
Closed formula for the sum of the following series
39659
Is there a closed formula for this summation?
76194
How one can obtain roots at the negative even integers of the Zeta function?
48246
Approximation of Riemann integrable function with a continuous function
51625
Analytic functions close to $\bar{z}$
41191
How to prove this $\pi$ formula?
92777
Riemann integrabilty of an indicator function
129801
Finding a closed form for $\sum^{n}_{k=1} \frac{k}{(k+1)!} $