Pincherle polynomials

In mathematics, the Pincherle polynomials P_n(x) are polynomials introduced by S. Pincherle (1891) given by the generating function

$(1-3xt+t^3{)}^{-1/2}=\sum _{n=0}^{\mathrm{\infty }}{P}_n(x)t^n$

Humbert polynomials are a generalization of Pincherle polynomials