12 times the total number of smallest parts in all partitions of n, with a(0) = 0.

Terms

a(0) =0a(1) =12a(2) =36a(3) =60a(4) =120a(5) =168a(6) =312a(7) =420a(8) =684a(9) =960a(10) =1428a(11) =1932a(12) =2856a(13) =3780a(14) =5280a(15) =7068a(16) =9612a(17) =12576a(18) =16884a(19) =21840a(20) =28788a(21) =37044a(22) =47976a(23) =61104a(24) =78540a(25) =99156a(26) =125832a(27) =157980a(28) =198744a(29) =247560