Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 8.

Terms

a(0) =0a(1) =1a(2) =10a(3) =38a(4) =100a(5) =380a(6) =1000a(7) =1141a(8) =1188a(9) =3441a(10) =3800a(11) =10000a(12) =10401a(13) =11410a(14) =11880a(15) =18188a(16) =33188a(17) =33441a(18) =34410a(19) =38000a(20) =100000a(21) =104010a(22) =114100a(23) =118800a(24) =181880a(25) =331880a(26) =334410a(27) =344100a(28) =380000a(29) =1000000