%I #4 Jan 09 2009 03:00:00
%S 0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9,10,11,11,12,12,13,14,14,15,16,16,17,
%T 17
%N Duplicate of A073869.
%K dead
%O 1,4