Prefix (or Levenshtein) codes for natural numbers.

Terms

a(0) =0a(1) =2a(2) =12a(3) =13a(4) =112a(5) =113a(6) =114a(7) =115a(8) =232a(9) =233a(10) =234a(11) =235a(12) =236a(13) =237a(14) =238a(15) =239a(16) =3840a(17) =3841a(18) =3842a(19) =3843a(20) =3844a(21) =3845a(22) =3846a(23) =3847a(24) =3848a(25) =3849a(26) =3850a(27) =3851a(28) =3852a(29) =3853