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Position of n-th 2 in A003137.
4

%I #9 Jul 13 2013 12:01:54

%S 2,8,9,11,13,14,23,32,34,37,40,41,42,45,48,50,51,54,57,59,60,61,63,64,

%T 66,67,68,80,92,95,99,103,104,116,128,131,135,139,140,142,146,150,152,

%U 154,158,162,164,166,167,170,171,174,175,176

%N Position of n-th 2 in A003137.

%C A003137(a(n)) = 2. - _Reinhard Zumkeller_, Feb 21 2013

%H Reinhard Zumkeller, <a href="/A030334/b030334.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (elemIndices)

%o a030334 n = a030334_list !! (n-1)

%o a030334_list = map (+ 1) $ elemIndices 2 a003137_list

%o -- _Reinhard Zumkeller_, Feb 21 2013

%Y Cf. A030332, A030333, A030338.

%K nonn

%O 1,1

%A _Clark Kimberling_