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%I #4 Mar 30 2012 18:56:19
%S 1,0,0,0,1,0,-1,0,0,0,0,0,1,1,2,1,0,0,0,0,0,1,1,0,0,1,1,0,0,-1,-1,-1,
%T -1,-1,-1,-2,-2,-1,0,-1,-2,-1,0,0,0,0,0,0,1,0,0,0,0,1,2,2,2,3,2,1,1,1,
%U 0,-1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,2,2,2,2
%N (# 1's)-(# 2's) in first n terms of A030604.
%K sign
%O 1,15
%A _Clark Kimberling_