a(n) = (8*n + 2)^3.

Terms

a(0) =8a(1) =1000a(2) =5832a(3) =17576a(4) =39304a(5) =74088a(6) =125000a(7) =195112a(8) =287496a(9) =405224a(10) =551368a(11) =729000a(12) =941192a(13) =1191016a(14) =1481544a(15) =1815848a(16) =2197000a(17) =2628072a(18) =3112136a(19) =3652264a(20) =4251528a(21) =4913000a(22) =5639752a(23) =6434856a(24) =7301384a(25) =8242408a(26) =9261000a(27) =10360232a(28) =11543176a(29) =12812904