Numbers k such that k and k^2 use only the digits 1, 3, 5, 6 and 9.

Terms

a(0) =1a(1) =3a(2) =6a(3) =13a(4) =19a(5) =31a(6) =56a(7) =63a(8) =366a(9) =369a(10) =563a(11) =956a(12) =966a(13) =1156a(14) =1166a(15) =1169a(16) =1913a(17) =3656a(18) =3913a(19) =5966a(20) =11669a(21) =19119a(22) =19131a(23) =31131a(24) =33666a(25) =36513a(26) =39619a(27) =59963a(28) =99666a(29) =116619