Numbers that contain a digit 1 in their decimal representation.

Terms

a(0) =1a(1) =10a(2) =11a(3) =12a(4) =13a(5) =14a(6) =15a(7) =16a(8) =17a(9) =18a(10) =19a(11) =21a(12) =31a(13) =41a(14) =51a(15) =61a(16) =71a(17) =81a(18) =91a(19) =100a(20) =101a(21) =102a(22) =103a(23) =104a(24) =105a(25) =106a(26) =107a(27) =108a(28) =109a(29) =110