a(n) = n*(n^3 + 2).

Terms

a(0) =0a(1) =3a(2) =20a(3) =87a(4) =264a(5) =635a(6) =1308a(7) =2415a(8) =4112a(9) =6579a(10) =10020a(11) =14663a(12) =20760a(13) =28587a(14) =38444a(15) =50655a(16) =65568a(17) =83555a(18) =105012a(19) =130359a(20) =160040a(21) =194523a(22) =234300a(23) =279887a(24) =331824a(25) =390675a(26) =457028a(27) =531495a(28) =614712a(29) =707339