  We calculate the perturbative value of the free energy in QCD on the lattice.
This quantity is directly related to the average plaquette.
  Our calculation is done to 3 loops using the clover action for fermions; the
results are presented for arbitrary values of the clover coefficient, and for a
wide range of fermion masses.
  In addition, we calculate the 2 loop result for the same quantity, using the
overlap action.
