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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 -580.4396372
correlated core -580.5580400
difference -0.1184028
  Energy (hartrees)
frozen core -580.4408912
correlated core -580.5591582
difference -0.1182671
  Energy (hartrees)
frozen core -580.4050589
correlated core -580.5238832
difference -0.1188243