Pidduck polynomial

Etymology
Introduced by Pidduck (1910–1912).

Noun

 * 1)  Any of a group of polynomials sn(x) given by the generating function $$\displaystyle \sum_n \frac{s_n(x)}{n!}t^n = \left(\frac{1+t}{1-t}\right)^x(1-t)^{-1}$$.