The number of points used to estimate the derivative of total energy with respect to the log of basis cut off energy. The minimum value allowed for this parameter is 2.
The cut-off energies at which the total energy is calculated, in order
to estimate the derivative, will be chosen equally spaced by
finite_basis_spacing with the highest energy equal to
cut_off_energy.
The default value of this parameter is 3.
Only used if finite_basis_corr = ``AUTO''