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Position of n-th 5 in A007376.
12

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

%S 5,21,41,61,81,90,92,94,96,98,100,101,102,104,106,108,121,141,161,181,

%T 207,237,267,297,327,341,344,347,350,353,356,357,359,362,365,368,387,

%U 417,447,477,507,537,567,597,627,641,644,647

%N Position of n-th 5 in A007376.

%C A007376(a(n)) = 5.

%H Reinhard Zumkeller, <a href="/A031292/b031292.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (elemIndices)

%o a031292 n = a031292_list !! (n-1)

%o a031292_list = map (+ 1) $ elemIndices 5 a007376_list

%o -- _Reinhard Zumkeller_, Jul 28 2011

%Y Cf. A193428; A031287, A031288, A031289, A031290, A031291, A031293, A031294, A031295, A031296.

%K nonn,less,base

%O 1,1

%A _Clark Kimberling_