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Position of n-th 3 in A007376.
12

%I #11 Jul 13 2013 12:01:55

%S 3,17,37,50,52,54,56,57,58,60,62,64,66,68,77,97,117,137,157,177,201,

%T 231,261,281,284,287,290,291,293,296,299,302,305,308,321,351,381,411,

%U 441,471,501,531,561,581,584,587,590,591,593,596

%N Position of n-th 3 in A007376.

%C A007376(a(n)) = 3.

%H Reinhard Zumkeller, <a href="/A031290/b031290.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (elemIndices)

%o a031290 n = a031290_list !! (n-1)

%o a031290_list = map (+ 1) $ elemIndices 3 a007376_list

%o -- _Reinhard Zumkeller_, Jul 28 2011

%Y Cf. A193428; A031287, A031288, A031289, A031291, A031292, A031293, A031294, A031295, A031296.

%K nonn,less,base

%O 1,1

%A _Clark Kimberling_