a(n) = n^3 - 7*n + 7.

Terms

a(0) =1a(1) =1a(2) =13a(3) =43a(4) =97a(5) =181a(6) =301a(7) =463a(8) =673a(9) =937a(10) =1261a(11) =1651a(12) =2113a(13) =2653a(14) =3277a(15) =3991a(16) =4801a(17) =5713a(18) =6733a(19) =7867a(20) =9121a(21) =10501a(22) =12013a(23) =13663a(24) =15457a(25) =17401a(26) =19501a(27) =21763a(28) =24193a(29) =26797