Sum of the "complements" of the integer partitions of n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =4a(5) =12a(6) =27a(7) =57a(8) =107a(9) =192a(10) =327a(11) =538a(12) =855a(13) =1329a(14) =2018a(15) =3003a(16) =4402a(17) =6349a(18) =9045a(19) =12720a(20) =17713a(21) =24395a(22) =33335a(23) =45118a(24) =60655a(25) =80888a(26) =107242a(27) =141177a(28) =184905a(29) =240679