Numbers k such that k and k^2 use only the digits 0, 1, 3, 5 and 8.

Terms

a(0) =0a(1) =1a(2) =10a(3) =100a(4) =1000a(5) =10000a(6) =58151a(7) =100000a(8) =550501a(9) =581510a(10) =1000000a(11) =5505010a(12) =5815100a(13) =5818151a(14) =10000000a(15) =55050100a(16) =55055001a(17) =58151000a(18) =58181510a(19) =100000000a(20) =183031501a(21) =550501000a(22) =550550010a(23) =555005001a(24) =581510000a(25) =581815100a(26) =1000000000a(27) =1000550501a(28) =1005055001a(29) =1830315010