Question Number 30433 by abdo imad last updated on 22/Feb/18
$${find}\:{the}\:{nature}\:{of}\:{the}\:{serie}\:\sum_{{n}=\mathrm{1}} ^{\infty} \:\:\:\frac{{n}^{\mathrm{2}{n}} }{\left({n}!\right)^{\mathrm{2}} }\:. \\ $$
find-the-nature-of-the-serie-n-1-n-2n-n-2-