Only generate clusters up to the maximum possible size.
Only generate clusters up to the maximum possible size.

The maximum possible size is dependent upon the number of excitors we
have occupied, the number of electrons and the truncation level.

hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande