Pn(α,β)⁡(x;c,d;q)=cn⁢q-(α+1)⁢n⁢(qα+1,-qα+1⁢c-1⁢d;q)n(q,-q;q)n⁢Pn⁡(qα+1⁢c-1⁢d⁢x;qα,qβ,-qα⁢c-1⁢d;q).