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%I #4 Mar 30 2012 18:56:18
%S 7,9,28,31,39,42,45,48,51,52,54,55,57,60,76,79,105,109,137,141,152,
%T 156,160,164,168,169,172,173,176,180,201,205,215,219,223,227,231,233,
%U 235,237,239,243,247,251,255,259,263,265,267,269
%N Position of n-th 2 in A030401.
%K nonn
%O 1,1
%A _Clark Kimberling_