a(n) = n*(n^2 - 3*n + 4).

Terms

a(0) =0a(1) =2a(2) =4a(3) =12a(4) =32a(5) =70a(6) =132a(7) =224a(8) =352a(9) =522a(10) =740a(11) =1012a(12) =1344a(13) =1742a(14) =2212a(15) =2760a(16) =3392a(17) =4114a(18) =4932a(19) =5852a(20) =6880a(21) =8022a(22) =9284a(23) =10672a(24) =12192a(25) =13850a(26) =15652a(27) =17604a(28) =19712a(29) =21982