Cubes using at most three distinct digits, not ending in 0.

Terms

a(0) =1a(1) =8a(2) =27a(3) =64a(4) =125a(5) =216a(6) =343a(7) =512a(8) =729a(9) =1331a(10) =2744a(11) =3375a(12) =46656a(13) =238328a(14) =778688a(15) =1030301a(16) =5177717a(17) =7077888a(18) =9393931a(19) =700227072a(20) =1003003001a(21) =44474744007