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

For SiH (Silylidyne)

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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.002183 -0.005610 -0.012449 -0.003586 -0.010033 -0.010282 -0.011445 -0.124076 -0.124288 -0.018153 -0.164359 -0.032817 -0.005824 -0.054730 -0.043622 -0.006707 -0.057329 -0.044774 -0.106197 -0.203997 -0.318705 -0.318983 -0.007005 -0.058477
MP3=FULL         -0.009849   -0.012715         -0.032831 -0.005588 -0.054680             -0.320876 -0.321158    
MP4=FULL   -0.005464     -0.009939       -0.124702       -0.005662 -0.055917   -0.006559 -0.058546       -0.322751 -0.323041    
B2PLYP=FULL -0.000721 -0.001781 -0.003912 -0.001133 -0.003138 -0.003211 -0.003570 -0.036369 -0.036432 -0.005630 -0.048353 -0.009916 -0.001842 -0.016593   -0.002113 -0.017347       -0.092124 -0.092212 -0.002205 -0.017680
Quadratic configuration interaction QCISD(T)=FULL         -0.009869   -0.011329       -0.164942   -0.005623 -0.055766   -0.006516 -0.058384       -0.322437 -0.322723 -0.006816 -0.059550
QCISD(TQ)=FULL         -0.009859   -0.011316           -0.005607 -0.055619   -0.006491 -0.058235              
Coupled Cluster CCSD=FULL         -0.009621         -0.017240 -0.163104 -0.032720 -0.005436 -0.054547 -0.043666 -0.006295 -0.057154 -0.044772     -0.319470 -0.319736 -0.006586 -0.058315
CCSD(T)=FULL         -0.009870           -0.164918 -0.033398 -0.005623 -0.055730 -0.044736 -0.006513 -0.058347 -0.045868   -0.205486 -0.322421 -0.322707 -0.006813 -0.059512
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ