%I #4 Mar 30 2012 18:56:20
%S 7,12,14,16,21,35,51,68,71,72,74,77,93,114,121,124,127,130,133,135,
%T 136,139,142,143,145,146,148,149,151,154,156,157,160,163,166,169,172,
%U 175,177,178,181,184,187,190,198,215,218,219,221
%N Position of n-th 2 in A031018.
%K nonn
%O 1,1
%A _Clark Kimberling_
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