![The Poisson-binomial distribution for hundreds of parameters](https://blogs.sas.com/content/iml/files/2020/10/PoisBinomRNA1-640x336.png)
A previous article shows how to use a recursive formula to compute exact probabilities for the Poisson-binomial distribution. The recursive formula is an O(N2) computation, where N is the number of parameters for the Poisson-binomial (PB) distribution. If you have a distribution that has hundreds (or even thousands) of parameters,