a(n) = (n-1)^2*(n+1).

Terms

a(0) =1a(1) =0a(2) =3a(3) =16a(4) =45a(5) =96a(6) =175a(7) =288a(8) =441a(9) =640a(10) =891a(11) =1200a(12) =1573a(13) =2016a(14) =2535a(15) =3136a(16) =3825a(17) =4608a(18) =5491a(19) =6480a(20) =7581a(21) =8800a(22) =10143a(23) =11616a(24) =13225a(25) =14976a(26) =16875a(27) =18928a(28) =21141a(29) =23520