Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 5.

Terms

a(0) =0a(1) =2a(2) =5a(3) =20a(4) =45a(5) =50a(6) =55a(7) =200a(8) =205a(9) =235a(10) =450a(11) =452a(12) =500a(13) =502a(14) =505a(15) =550a(16) =2000a(17) =2005a(18) =2050a(19) =2055a(20) =2245a(21) =2335a(22) =2350a(23) =4500a(24) =4520a(25) =5000a(26) =5002a(27) =5005a(28) =5020a(29) =5045