https://rdrr.io/github/dcgerard/updogAlpha/man/dbetabinom.html
dbetabinom: Beta-binomial density function. in dcgerard/updogAlpha: Using Parental Data for...
Note that it is possible here for alpha = 0 or for beta = 0 (but not both). In which case, this function becomes the indicator function for x == 0 (when alpha...
density function