Question

20%5Cleft%28n%5Cright%29%7D%7Bn%5E2%7D" id="TexFormula1" title="\sum _{n=0}^{\infty \:}\frac{\left(-1\right)^n\arctan \left(n\right)}{n^2}" alt="\sum _{n=0}^{\infty \:}\frac{\left(-1\right)^n\arctan \left(n\right)}{n^2}" align="absmiddle" class="latex-formula">  Please Help. 

Answer 1

-1/00 should be the answer