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Energy differences between frozen core and full core for CCSD(T)/cc-pVTZ

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For ()
  Energy (hartrees)
frozen core -579.1607297
correlated core -579.2798215
difference -0.1190917
  Energy (hartrees)
frozen core -579.1942425
correlated core -579.3098064
difference -0.1155639
  Energy (hartrees)
frozen core -579.2223060
correlated core -579.3392281
difference -0.1169221
  Energy (hartrees)
frozen core -579.2064540
correlated core -579.3232852
difference -0.1168312