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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For AsF3 (Arsenic trifluoride)

Energies in Hartree
Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.000528 -0.009938 -0.017223 -0.017929 -0.045493 -0.045493 -0.049063 -0.436185 -0.436185 -0.133052 -0.017318 -0.094998 -0.022387 -0.109767
MP3=FULL         -0.043617   -0.111694              
Coupled Cluster CCSD=FULL         -0.044079         -0.125338   -0.088322   -0.102354
CCSD(T)=FULL         -0.045351           -0.016225 -0.090504 -0.021198 -0.104491
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ