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%I
%S 36,38,40,42,44,157,160,163,166,169,307,310,313,316,319,457,460,463,
%T 466,469,546,549,552,555,558,561,564,567,570,573,576,579,582,585,588,
%U 591,594,597,600,603,606,607,609,610,612,613,615
%N Position of n-th 4 in A031312.
%K nonn
%O 1,1
%A _Clark Kimberling_
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