Pincherle polynomials explained

In mathematics, the Pincherle polynomials P_n(x) are polynomials introduced by given by the generating function

\displaystyle ( 1-3 xt + t ^{3)} ^{-1/2} = \sum ^{inf ty} _{n =0} P ^{n} _{n(x)t}

Humbert polynomials are a generalization of Pincherle polynomials