%I #3 May 11 2007 03:00:00
%S 0,1,1,2,2,3,3,3,3,4,4,5,5,6,6,4,4,5,5,6,6,7,7,7,7,8,8,9,9,10,10,5,5,6
%N Duplicate of A073642.
%K dead
%O 1,4