Numbers k such that k and k^2 use only the digits 3, 4, 6, 8 and 9.

Terms

a(0) =3a(1) =6a(2) =8a(3) =63a(4) =83a(5) =93a(6) =94a(7) =683a(8) =833a(9) =836a(10) =6633a(11) =6833a(12) =6963a(13) =8333a(14) =8336a(15) =9843a(16) =9933a(17) =66833a(18) =68333a(19) =69883a(20) =83333a(21) =83336a(22) =83664a(23) =94836a(24) =96643a(25) =96886a(26) =98336a(27) =99694a(28) =666333a(29) =666963