Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 9.

Terms

a(0) =0a(1) =1a(2) =3a(3) =10a(4) =30a(5) =100a(6) =300a(7) =1000a(8) =1049a(9) =1393a(10) =3000a(11) =10000a(12) =10490a(13) =10493a(14) =13930a(15) =30000a(16) =33903a(17) =44049a(18) =100000a(19) =100499a(20) =104900a(21) =104930a(22) =109499a(23) =139300a(24) =300000a(25) =339030a(26) =440490a(27) =1000000a(28) =1004990a(29) =1004993