Numbers k such that k and k^2 use only the digits 0, 3, 5, 8 and 9.

Terms

a(0) =0a(1) =3a(2) =30a(3) =300a(4) =553a(5) =583a(6) =3000a(7) =5530a(8) =5553a(9) =5830a(10) =30000a(11) =55300a(12) =55503a(13) =55530a(14) =58300a(15) =95333a(16) =300000a(17) =550503a(18) =553000a(19) =555030a(20) =555300a(21) =555503a(22) =583000a(23) =583053a(24) =953330a(25) =3000000a(26) =5505003a(27) =5505030a(28) =5530000a(29) =5550300