a(n) = (9*n+1)*(9*n+8).

Terms

a(0) =8a(1) =170a(2) =494a(3) =980a(4) =1628a(5) =2438a(6) =3410a(7) =4544a(8) =5840a(9) =7298a(10) =8918a(11) =10700a(12) =12644a(13) =14750a(14) =17018a(15) =19448a(16) =22040a(17) =24794a(18) =27710a(19) =30788a(20) =34028a(21) =37430a(22) =40994a(23) =44720a(24) =48608a(25) =52658a(26) =56870a(27) =61244a(28) =65780a(29) =70478