a(n) = (10*n + 4)^3.

Terms

a(0) =64a(1) =2744a(2) =13824a(3) =39304a(4) =85184a(5) =157464a(6) =262144a(7) =405224a(8) =592704a(9) =830584a(10) =1124864a(11) =1481544a(12) =1906624a(13) =2406104a(14) =2985984a(15) =3652264a(16) =4410944a(17) =5268024a(18) =6229504a(19) =7301384a(20) =8489664a(21) =9800344a(22) =11239424a(23) =12812904a(24) =14526784a(25) =16387064a(26) =18399744a(27) =20570824a(28) =22906304a(29) =25412184