%I
%S 3,11,21,26,28,30,31,32,34,41,54,69,84,91,94,97,99,100,103,114,129,
%T 144,159,166,169,172,174,175,178,189,197,200,203,204,206,209,212,215,
%U 218,219,221,224,227,230,233,234,236,239,241,242
%N Position of n-th 3 in A031235.
%K nonn
%O 1,1
%A _Clark Kimberling_
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