Numbers whose set of base-9 digits is {1,4}.

Terms

a(0) =1a(1) =4a(2) =10a(3) =13a(4) =37a(5) =40a(6) =91a(7) =94a(8) =118a(9) =121a(10) =334a(11) =337a(12) =361a(13) =364a(14) =820a(15) =823a(16) =847a(17) =850a(18) =1063a(19) =1066a(20) =1090a(21) =1093a(22) =3007a(23) =3010a(24) =3034a(25) =3037a(26) =3250a(27) =3253a(28) =3277a(29) =3280