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

For SiH3NH2 (Silane, amino)

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) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.003772 -0.007674 -0.014259 -0.005157 -0.014053 -0.015383 -0.016475 -0.142374 -0.143405 -0.030370 -0.186286 -0.050584 -0.010397 -0.074876 -0.078562 -0.013397 -0.082399 -0.083627 -0.013736 -0.085664
MP3=FULL         -0.013686   -0.016122       -0.186581 -0.051171 -0.009928 -0.075082         -0.013254 -0.086173
MP4=FULL   -0.007384     -0.013907       -0.144546   -0.188631   -0.010078 -0.076494   -0.013131 -0.084257   -0.013478 -0.087568
B2PLYP=FULL -0.001232 -0.002399 -0.004442 -0.001606 -0.004325 -0.004713 -0.005050 -0.041538 -0.041851 -0.009196 -0.054546 -0.014971 -0.003213 -0.022394   -0.004129 -0.024554   -0.004233 -0.025494
Quadratic configuration interaction QCISD(T)=FULL         -0.013882           -0.188494   -0.010042 -0.076363   -0.013083 -0.084130   -0.013430 -0.087443
Coupled Cluster CCSD=FULL         -0.013588         -0.030071 -0.186635 -0.051215 -0.009799 -0.075163 -0.079750 -0.012776 -0.082931   -0.013113 -0.086272
CCSD(T)=FULL         -0.013885           -0.188466 -0.051953 -0.010044 -0.076341 -0.081047 -0.013084 -0.084108 -0.085452 -0.013431 -0.087422
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ