invztrans finds the inverse Z transformation of $f\left(z\right)$ with respect to n.

invztrans can find the inverse Z transform of rational polynomials and a few special functions.

$\mathrm{invztrans}\left(\frac{z}{z-2}\,z\,n\right)$

$2^n$

$\mathrm{invztrans}\left(\frac{6z^2-13z}{z^2-5z+6}\,z\,t\right)$

$53^t+2^t$

$\mathrm{invztrans}\left(a\exp \left(\frac{3}{z}\right)\,z\,n\right)$

$\frac{a{3}^n}{n!}$

$\mathrm{invztrans}\left(\mathrm{ztrans}\left(f\left(n\right)\,n\,w\right)\,w\,n\right)$

$f\left(n\right)$