| dnbconv | Probability mass function |
| nbconv_params | Summary statistics |
| nb_sum_exact | Furman's PMF |
| nb_sum_moments | Method of moments |
| nb_sum_saddlepoint | Saddlepoint approximation |
| pnbconv | Cumulative distribution function |
| qnbconv | Quantile function |
| rnbconv | Random deviates |