%I #4 Mar 30 2012 18:56:19
%S 2,11,22,24,25,26,28,30,32,34,39,53,67,81,97,118,134,137,139,140,143,
%T 146,149,152,160,181,202,223,240,243,244,246,249,252,255,258,261,264,
%U 265,267,270,273,276,279,281,282,284,285,286
%N Position of n-th 2 in A031007.
%K nonn
%O 1,1
%A _Clark Kimberling_