Closed-shell Møller-Plesset perturbation theory up to full fourth order [MP4(SDTQ)] is part of the coupled-cluster program.
The commands MP2, MP3, MP4 perform the MP calculations up to the specified order (lower orders are included).
MP4;NOTRIPL; performs MP4(SDQ) calculations.
Normally, no further input is needed if the MPn card directly follows the corresponding HF-SCF. Otherwise, occupancies and orbitals can be specified as in the CI program. The resulting energies are stored in variables as explained in section 8.8.