Denisyuk polynomials

In mathematics, Denisyuk polynomials De_n(x) or M_n(x) are generalizations of the Laguerre polynomials introduced by Denisyuk (1954) given by the generating function^[1]

$${\displaystyle \displaystyle \sum _{n=0}^{\infty }t^{n}M_{n}(x)={\frac {1}{1+t}}\exp \left(-{\frac {xt}{1-t}}\right).}$$