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

Terms

a(0) =2a(1) =5a(2) =6a(3) =25a(4) =65a(5) =66a(6) =235a(7) =256a(8) =665a(9) =666a(10) =2335a(11) =2535a(12) =6665a(13) =6666a(14) =23335a(15) =23525a(16) =23566a(17) =66665a(18) =66666a(19) =233335a(20) =235462a(21) =254235a(22) =255465a(23) =652244a(24) =665256a(25) =666665a(26) =666666a(27) =2333335a(28) =2335432a(29) =2335666