:term:`MRCC_METHOD <MRCC_METHOD (MRCC)>`
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      If more than one root is requested and calc=1, LR-CC (EOM-CC) calculation is performed automatically for the excited states. This overrides all automatic determination of method and will only work with :py:func:`~driver.energy`. This becomes CC/CI (option \#5) in fort.56 | \begin{tabular}{ccc} | Value & Method & Description \\ | \hline | 1 & CC & \\ | 2 & CC(n-1)[n] & \\ | 3 & CC(n-1)(n) & (CC(n-1)[n] energy is also calculated) \\ | 4 & CC(n-1)(n)_L & (CC(n-1)[n] and CC(n-1)(n) energies are also calculated) \\ | 5 & CC(n)-1a & \\ | 6 & CC(n)-1b & \\ | 7 & CCn & \\ | 8 & CC(n)-3 & \\ | \end{tabular} 

      * **Type**: integer
      * **Default**: 1