\[\Psi^{N}_{x_{i},l}(r)=\\
A_{x_{i},l}\sum_{n=0}^{N-1}\frac{n!}{(n+2l+1)!}P^{(l+1)}_{n}\left(x_{i};\frac{%
2Z}{s},-\frac{2Z}{s}\right)\phi_{n,l}(sr),\]