Numbers whose set of base-16 digits is {1,4}.

Terms

a(0) =1a(1) =4a(2) =17a(3) =20a(4) =65a(5) =68a(6) =273a(7) =276a(8) =321a(9) =324a(10) =1041a(11) =1044a(12) =1089a(13) =1092a(14) =4369a(15) =4372a(16) =4417a(17) =4420a(18) =5137a(19) =5140a(20) =5185a(21) =5188a(22) =16657a(23) =16660a(24) =16705a(25) =16708a(26) =17425a(27) =17428a(28) =17473a(29) =17476