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%I #6 Sep 07 2022 13:21:06
%S 3,1,2,3,3,1,2,1,2,3,1,2,3,3,1,2,3,3,1,2,1,2,3,1,2,1,2,3,1,2,3,3,1,2,
%T 1,2,3,1,2,3,3,1,2,3,3,1,2,1,2,3,1,2,3,3,1,2,3,3,1,2,1,2,3,1,2,1,2,3,
%U 1,2,3,3,1,2,1,2,3,1,2,1,2,3,1,2,3,3,1,2,1,2
%N a(n) = (1/2)*(s(n) - s(n-1)), where s = A026180.
%Y Cf. A026180.
%K nonn
%O 3,1
%A _Clark Kimberling_
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