1,2

The fact that the sequence is increasing makes it finite.

Table of n, a(n) for n=1..27.

12 follows 9 since 10 has the digit 0 and 11 has a repeated digit.

34 follows 12 since any number in between either shares a digit with 12, has a 0 (30), or a repeated digit (33).

Sequence in context: A038186 A118575 A289791 * A290388 A302504 A165307

Adjacent sequences: A290383 A290384 A290385 * A290387 A290388 A290389

nonn,base,fini,full

Enrique Navarrete, Jul 28 2017

approved