Numbers k such that k and k^2 use only the digits 0, 3, 4, 5 and 9.

Terms

a(0) =0a(1) =3a(2) =30a(3) =300a(4) =3000a(5) =30000a(6) =30503a(7) =30903a(8) =300000a(9) =305030a(10) =309030a(11) =550503a(12) =950503a(13) =953903a(14) =3000000a(15) =3005003a(16) =3009003a(17) =3050300a(18) =3055003a(19) =3090300a(20) =5505030a(21) =9505030a(22) =9539030a(23) =30000000a(24) =30050030a(25) =30090030a(26) =30503000a(27) =30550030a(28) =30903000a(29) =55050300