When cubed gives number composed just of the digits 0, 1, 2, 3, 4.

Terms

a(0) =0a(1) =1a(2) =7a(3) =10a(4) =11a(5) =68a(6) =70a(7) =100a(8) =101a(9) =110a(10) =324a(11) =680a(12) =700a(13) =1000a(14) =1001a(15) =1010a(16) =1100a(17) =3240a(18) =6800a(19) =7000a(20) =7618a(21) =10000a(22) =10001a(23) =10010a(24) =10100a(25) =11000a(26) =31177a(27) =32400a(28) =52308a(29) =68000