Numbers whose set of base-16 digits is {1,3}.

Terms

a(0) =1a(1) =3a(2) =17a(3) =19a(4) =49a(5) =51a(6) =273a(7) =275a(8) =305a(9) =307a(10) =785a(11) =787a(12) =817a(13) =819a(14) =4369a(15) =4371a(16) =4401a(17) =4403a(18) =4881a(19) =4883a(20) =4913a(21) =4915a(22) =12561a(23) =12563a(24) =12593a(25) =12595a(26) =13073a(27) =13075a(28) =13105a(29) =13107