Numbers whose set of base-5 digits is {1,3}.

Terms

a(0) =1a(1) =3a(2) =6a(3) =8a(4) =16a(5) =18a(6) =31a(7) =33a(8) =41a(9) =43a(10) =81a(11) =83a(12) =91a(13) =93a(14) =156a(15) =158a(16) =166a(17) =168a(18) =206a(19) =208a(20) =216a(21) =218a(22) =406a(23) =408a(24) =416a(25) =418a(26) =456a(27) =458a(28) =466a(29) =468