a(n) = 2*n^3.

Terms

a(0) =0a(1) =2a(2) =16a(3) =54a(4) =128a(5) =250a(6) =432a(7) =686a(8) =1024a(9) =1458a(10) =2000a(11) =2662a(12) =3456a(13) =4394a(14) =5488a(15) =6750a(16) =8192a(17) =9826a(18) =11664a(19) =13718a(20) =16000a(21) =18522a(22) =21296a(23) =24334a(24) =27648a(25) =31250a(26) =35152a(27) =39366a(28) =43904a(29) =48778