This is documentation for an old release of SciPy (version 0.7.). Read this page Search for this page in the documentation of the latest stable release (version 1.15.1).

scipy.special.nbdtrc

scipy.special.nbdtrc(x1, x2, x3[, out])

y=nbdtrc(k,n,p) returns the sum of the terms k+1 to infinity of the negative binomial distribution.