Numbers whose set of base-9 digits is {1,3}.

Terms

a(0) =1a(1) =3a(2) =10a(3) =12a(4) =28a(5) =30a(6) =91a(7) =93a(8) =109a(9) =111a(10) =253a(11) =255a(12) =271a(13) =273a(14) =820a(15) =822a(16) =838a(17) =840a(18) =982a(19) =984a(20) =1000a(21) =1002a(22) =2278a(23) =2280a(24) =2296a(25) =2298a(26) =2440a(27) =2442a(28) =2458a(29) =2460