%N Start with a(1) = 1. For n>1, choose a(n) to be the smallest number > a(n-1) consistent with the condition that "the a(n)-th digit is a 1" is true for all n.
%C There can be 1's in other positions too.
%C Sequence A098645 does not allow 1's in other positions, A210415 is a variant which does not impose a(n)>a(n-1). - _M. F. Hasler_, Oct 08 2013
%H <a href="/index/Se#self-referencing_sequences">Index to the OEIS: Entries related to self-referencing sequences</a>.
%e The first digit of the sequence is a "1", the 3rd digit also, then the 10th, the 11th, etc.
%Y Cf. A098670. See A098645 for another version.
%Y Cf. A210414-A210423.
%A _Eric Angelini_, Oct 27 2004
%E Entry revised by Eric Angelini and _N. J. A. Sloane_, Feb 03 2006.
%E More terms from _Rick L. Shepherd_, Feb 05 2006