Numbers whose digits contain no loops (version 2).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =11a(6) =12a(7) =13a(8) =15a(9) =17a(10) =21a(11) =22a(12) =23a(13) =25a(14) =27a(15) =31a(16) =32a(17) =33a(18) =35a(19) =37a(20) =51a(21) =52a(22) =53a(23) =55a(24) =57a(25) =71a(26) =72a(27) =73a(28) =75a(29) =77