Numbers k such that k and k^2 use only the digits 1, 3, 4, 5 and 6.

Terms

a(0) =1a(1) =4a(2) =6a(3) =34a(4) =56a(5) =66a(6) =116a(7) =334a(8) =666a(9) =1146a(10) =1156a(11) =3334a(12) =3656a(13) =6454a(14) =6666a(15) =11556a(16) =33334a(17) =36556a(18) =66454a(19) =66666a(20) =116454a(21) =333334a(22) =561556a(23) =643546a(24) =666666a(25) =1163466a(26) =1164631a(27) =3333334a(28) =3341354a(29) =3363646