Numbers whose set of base-7 digits is {1,3}.

Terms

a(0) =1a(1) =3a(2) =8a(3) =10a(4) =22a(5) =24a(6) =57a(7) =59a(8) =71a(9) =73a(10) =155a(11) =157a(12) =169a(13) =171a(14) =400a(15) =402a(16) =414a(17) =416a(18) =498a(19) =500a(20) =512a(21) =514a(22) =1086a(23) =1088a(24) =1100a(25) =1102a(26) =1184a(27) =1186a(28) =1198a(29) =1200