When cubed gives number composed just of the digits 1, 2, 3, 4, 5.

Terms

a(0) =1a(1) =5a(2) =7a(3) =8a(4) =11a(5) =68a(6) =81a(7) =177a(8) =351a(9) =605a(10) =1311a(11) =1645a(12) =1758a(13) =2247a(14) =2474a(15) =2485a(16) =2824a(17) =6165a(18) =7568a(19) =11217a(20) =15228a(21) =28114a(22) =28128a(23) =28947a(24) =115558a(25) =224681a(26) =225805a(27) =351758a(28) =357141a(29) =357147