Numbers k such that k and k^2 use only the digits 1, 3, 4, 8 and 9.

Terms

a(0) =1a(1) =3a(2) =9a(3) =38a(4) =43a(5) =141a(6) =183a(7) =438a(8) =441a(9) =1183a(10) =1188a(11) =1191a(12) =1391a(13) =3391a(14) =3438a(15) =9188a(16) =9433a(17) =11893a(18) =31488a(19) =43988a(20) =91183a(21) =114891a(22) =141191a(23) =141391a(24) =183933a(25) =333891a(26) =911833a(27) =939938a(28) =943988a(29) =1183188