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Position of n-th 9 in A007376.
12

%I #13 Jan 20 2024 18:00:14

%S 9,29,49,69,89,109,129,149,169,170,172,174,176,178,180,182,184,186,

%T 188,189,219,249,279,309,339,369,399,429,459,461,464,467,470,473,476,

%U 479,482,485,488,489,519,549,579,609,639,669,699

%N Position of n-th 9 in A007376.

%C A007376(a(n)) = 9.

%H Reinhard Zumkeller, <a href="/A031296/b031296.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (elemIndices)

%o a031296 n = a031296_list !! (n-1)

%o a031296_list = map (+ 1) $ elemIndices 9 a007376_list

%o -- _Reinhard Zumkeller_, Jul 28 2011

%Y Cf. A007376.

%Y Cf. A193428; A031287, A031288, A031289, A031290, A031291, A031292, A031293, A031294, A031295.

%K nonn,less,base

%O 1,1

%A _Clark Kimberling_