Sum of all parts minus the total number of parts of the last section of the set of partitions of n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =7a(5) =16a(6) =20a(7) =39a(8) =52a(9) =86a(10) =113a(11) =184a(12) =232a(13) =353a(14) =462a(15) =661a(16) =851a(17) =1202a(18) =1526a(19) =2098a(20) =2670a(21) =3565a(22) =4514a(23) =5967a(24) =7473a(25) =9715a(26) =12162a(27) =15583a(28) =19373a(29) =24625