Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 8.

Terms

a(0) =0a(1) =1a(2) =10a(3) =100a(4) =1000a(5) =10000a(6) =10401a(7) =10888a(8) =100000a(9) =100501a(10) =104010a(11) =108880a(12) =1000000a(13) =1004001a(14) =1005010a(15) =1040100a(16) =1088800a(17) =10000000a(18) =10005001a(19) =10040010a(20) =10050100a(21) =10401000a(22) =10414151a(23) =10888000a(24) =100000000a(25) =100040001a(26) =100050010a(27) =100400100a(28) =100501000a(29) =104010000