Total number of parts in all partitions of n with at least one distinct part.

Terms

a(0) =0a(1) =0a(2) =2a(3) =5a(4) =14a(5) =23a(6) =46a(7) =71a(8) =115a(9) =174a(10) =263a(11) =371a(12) =542a(13) =756a(14) =1044a(15) =1432a(16) =1947a(17) =2605a(18) =3478a(19) =4588a(20) =6020a(21) =7863a(22) =10182a(23) =13114a(24) =16820a(25) =21480a(26) =27254a(27) =34489a(28) =43423a(29) =54491