Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 9.

Terms

a(0) =2a(1) =3a(2) =5a(3) =23a(4) =235a(5) =2235a(6) =2335a(7) =2435a(8) =4923a(9) =4935a(10) =4943a(11) =5435a(12) =5935a(13) =22235a(14) =23335a(15) =49335a(16) =54335a(17) =229335a(18) =233335a(19) =492235a(20) =492435a(21) =493923a(22) =495943a(23) =499335a(24) =499423a(25) =2234935a(26) =2333335a(27) =2354235a(28) =2439923a(29) =4954235