a(n) = 9*n^3.

Terms

a(0) =0a(1) =9a(2) =72a(3) =243a(4) =576a(5) =1125a(6) =1944a(7) =3087a(8) =4608a(9) =6561a(10) =9000a(11) =11979a(12) =15552a(13) =19773a(14) =24696a(15) =30375a(16) =36864a(17) =44217a(18) =52488a(19) =61731a(20) =72000a(21) =83349a(22) =95832a(23) =109503a(24) =124416a(25) =140625a(26) =158184a(27) =177147a(28) =197568a(29) =219501