\begin{equation}
H = \sum_{i}\ h\left(i\right) + \frac{1}{2}\sum_{i\ne j}\ g\left(i,j\right) + V_{NN}; \quad V_{NN} = \frac{1}{2}\sum_{A\ne B} \frac{Z_A Z_B}{R_{AB}}
\end{equation}