is a Generalized Hypergeometric Function and is the Gamma Function. It can be
derived from the Dougall-Ramanujan Identity and written in the symmetric form
for with a negative integer and the Pochhammer Symbol (Petkovsek et al. 1996).
See also Dougall-Ramanujan Identity, Generalized Hypergeometric Function
Petkovsek, M.; Wilf, H. S.; and Zeilberger, D. A=B. Wellesley, MA: A. K. Peters, pp. 43 and 126, 1996.
© 1996-9 Eric W. Weisstein