We then extended this procedure to the B97c-type formulation of the DC contribution, starting from a short expansion of the power series for both same-spin and opposite spin terms (m = 2, see Theory section) and increasing the series length stepwise up to m = 5 (Figure ). We recall (see Theory) that B95c can be interpreted as an m = 2 expansion after removing a mixed-power term in the same-spin contribution.