\[R_{n}\left(y(y+\gamma+\delta+1);\alpha,\beta,\gamma,\delta\right)={{}_{4}F_{3}%
}\left({-n,n+\alpha+\beta+1,-y,y+\gamma+\delta+1\atop\alpha+1,\beta+\delta+1,%
\gamma+1};1\right),\]