Numbers k such that k and k^2 use only the digits 0, 3, 4, 8 and 9.

Terms

a(0) =0a(1) =3a(2) =30a(3) =300a(4) =3000a(5) =30000a(6) =89938a(7) =300000a(8) =308043a(9) =899380a(10) =899938a(11) =939938a(12) =940393a(13) =940398a(14) =943043a(15) =943898a(16) =3000000a(17) =3080430a(18) =8993333a(19) =8993800a(20) =8993933a(21) =8999083a(22) =8999380a(23) =8999938a(24) =9399380a(25) =9403930a(26) =9403980a(27) =9430430a(28) =9438980a(29) =30000000