Numbers k such that k and k^2 use only the digits 0, 1, 2, 5 and 9.

Terms

a(0) =0a(1) =1a(2) =5a(3) =10a(4) =11a(5) =15a(6) =50a(7) =95a(8) =100a(9) =101a(10) =105a(11) =110a(12) =150a(13) =500a(14) =501a(15) =505a(16) =950a(17) =955a(18) =995a(19) =1000a(20) =1001a(21) =1005a(22) =1010a(23) =1011a(24) =1050a(25) =1095a(26) =1100a(27) =1101a(28) =1105a(29) =1500