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%I #4 Mar 30 2012 18:56:18
%S 0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,1,2,3,4,3,4,4,5,5,6,6,5,5,4,5,
%T 4,3,2,2,1,1,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,
%U 0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1
%N a(n)=(# 2's)-(# 3's) in first n terms of A030567.
%K nonn
%O 1,21
%A _Clark Kimberling_