Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 8.

Terms

a(0) =2a(1) =5a(2) =22a(3) =232a(4) =235a(5) =482a(6) =485a(7) =585a(8) =2332a(9) =2335a(10) =2885a(11) =4832a(12) =23332a(13) =23335a(14) =23522a(15) =28885a(16) =48522a(17) =58522a(18) =228885a(19) =232885a(20) =233332a(21) =233335a(22) =233522a(23) =288885a(24) =482585a(25) =483585a(26) =484235a(27) =488388a(28) =2328832a(29) =2332885