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

Terms

a(0) =0a(1) =5a(2) =50a(3) =55a(4) =235a(5) =500a(6) =505a(7) =550a(8) =2350a(9) =5000a(10) =5005a(11) =5050a(12) =5055a(13) =5500a(14) =5505a(15) =23500a(16) =50000a(17) =50005a(18) =50050a(19) =50055a(20) =50235a(21) =50500a(22) =50550a(23) =55000a(24) =55005a(25) =55050a(26) =235000a(27) =235235a(28) =500000a(29) =500005