%I
%S 1,2,3,5,6,9,12,17,29,45,48,81,105,108,177,245,323,324,569,648,893,
%T 1277,1296,2121,2592,3221,4853,5184,7697,11015,15333,15552,25841
%N Positions at which powers of 2 occur in A051145.
%C A209229(A051145(a(n))) = 1;
%C the definition of this sequence was the original definition of A051147.
%o (Haskell)
%o import Data.List (findIndices)
%o a244747 n = a244747_list !! (n1)
%o a244747_list = findIndices ((== 1) . a209229) a051145_list
%Y Cf. A209229, A051147 (subsequence).
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Jul 05 2014
