Numbers whose set of base-13 digits is {1,4}.

Terms

a(0) =1a(1) =4a(2) =14a(3) =17a(4) =53a(5) =56a(6) =183a(7) =186a(8) =222a(9) =225a(10) =690a(11) =693a(12) =729a(13) =732a(14) =2380a(15) =2383a(16) =2419a(17) =2422a(18) =2887a(19) =2890a(20) =2926a(21) =2929a(22) =8971a(23) =8974a(24) =9010a(25) =9013a(26) =9478a(27) =9481a(28) =9517a(29) =9520