%N a(n) is the smallest positive number not yet in the sequence that contains exactly one even digit and exactly one odd digit from a(n-1), and no digit in a(n) is repeated.
%C The terms sorted in increasing order give A309539.
%e a(2)=102: a(2) is not 100 (since zero would be repeated), nor 101 (since 1 would be repeated).
%Y Cf. A184992, A318700, A309390, A309539, A076654.
%A _Enrique Navarrete_, Aug 06 2019