%I #2 Mar 31 2012 14:43:40
%S 0,1,2,3,4,5,6,7,8,9,11,12,13,21,111,311,2111,11111,11112,11113,11114,
%T 31111
%N First digit of a(n) is the a(n)-th digit of S [a(n+1) is the smallest available integer not yet present in S, subject to S being monotonically increasing].
%C An example of what logologists call a "self-acronymic" sequence.
%Y Cf. A126968.
%K nonn,base
%O 0,3
%A _Eric Angelini_, Mar 22 2007