Numbers k such that k and k^2 use only the digits 1, 3, 4, 6 and 9.

Terms

a(0) =1a(1) =3a(2) =4a(3) =6a(4) =13a(5) =14a(6) =19a(7) =31a(8) =44a(9) =63a(10) =119a(11) =369a(12) =643a(13) =1146a(14) =1414a(15) =1914a(16) =3114a(17) =3364a(18) =4119a(19) =6414a(20) =6646a(21) =11914a(22) =11963a(23) =14119a(24) =31131a(25) =31614a(26) =34196a(27) =36694a(28) =44313a(29) =64313