A031271 - OEIS

%I #4 Mar 30 2012 18:56:21

%S 1,4,6,11,12,13,16,21,25,27,37,50,52,53,56,57,69,70,73,76,77,81,82,95,

%T 98,102,110,111,116,121,122,123,134,135,136,137,142,149,155,157,159,

%U 165,189,192,202,204,215,217,219,222,223,225

%N Position of n-th 1 in A031269.

%K nonn

%O 1,2

%A _Clark Kimberling_