Fig. 1: Partial sums (a) and high-order energy corrections (c) for HO-MBPT for 16O. The corresponding values for HF-MBPT are displayed in (b) and (d), respectively. All calculations are performed in a emax = 4 truncated model space with ħΩ = 24MeV and α= 0.08fm4. We use a NN+3N-full interaction with a three-body cutoff Λ3N = 450MeV.