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

Terms

a(0) =2a(1) =6a(2) =8a(3) =22a(4) =62a(5) =68a(6) =262a(7) =482a(8) =622a(9) =662a(10) =668a(11) =4832a(12) =4844a(13) =6662a(14) =6668a(15) =26238a(16) =48628a(17) =66662a(18) =66668a(19) =483368a(20) =666662a(21) =666668a(22) =828482a(23) =828628a(24) =2623628a(25) =2886838a(26) =2888482a(27) =4833668a(28) =4882262a(29) =6232438