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A031294 Position of n-th 7 in A007376. 12

%I

%S 7,25,45,65,85,105,125,130,132,134,136,138,140,142,144,145,146,148,

%T 165,185,213,243,273,303,333,363,393,401,404,407,410,413,416,419,422,

%U 423,425,428,453,483,513,543,573,603,633,663,693

%N Position of n-th 7 in A007376.

%C A007376(a(n)) = 7.

%H Reinhard Zumkeller, <a href="/A031294/b031294.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (elemIndices)

%o a031294 n = a031294_list !! (n-1)

%o a031294_list = map (+ 1) $ elemIndices 7 a007376_list

%o -- _Reinhard Zumkeller_, Jul 28 2011

%Y Cf. A193428; A031287, A031288, A031289, A031290, A031291, A031292, A031293, A031295, A031296.

%K nonn,less,base

%O 1,1

%A _Clark Kimberling_

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Last modified July 11 20:03 EDT 2020. Contains 335652 sequences. (Running on oeis4.)