The generating function of the Touchard polynomials $T_n(x)$ is given by $$\sum_{n=0}^\infty \frac{T_n(x)}{n!}t^n = \exp(x(e^t-1)).$$ Is there a known set of polynomials having a generating function $$\exp(x(e^{t_1}+e^{t_2}-2))?$$ More general, $$\exp(x(\sum_{n=1}^d (e^{t_n}-1)))?$$
2026-03-27 13:17:47.1774617467
Polynomials having the generating function $\exp(x(e^{t_1}+e^{t_2}-2))$
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