a(n) = (8*n + 5)^3.

Terms

a(0) =125a(1) =2197a(2) =9261a(3) =24389a(4) =50653a(5) =91125a(6) =148877a(7) =226981a(8) =328509a(9) =456533a(10) =614125a(11) =804357a(12) =1030301a(13) =1295029a(14) =1601613a(15) =1953125a(16) =2352637a(17) =2803221a(18) =3307949a(19) =3869893a(20) =4492125a(21) =5177717a(22) =5929741a(23) =6751269