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A030337 Length of n-th run of digit 1 in A003137. 4

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

%S 1,1,3,1,1,1,2,2,5,1,1,2,1,1,2,1,1,1,1,2,1,1,1,3,1,1,1,2,2,2,3,3,7,2,

%T 2,3,1,1,2,1,1,1,3,1,1,1,2,1,1,2,1,1,1,1,1,1,2,3,2,1,1,1,1,1,1,2,1,1,

%U 1,1,2,1,1,1,3,1,1,1,2,1,1,1,1,2,1,1,2,1,4,2

%N Length of n-th run of digit 1 in A003137.

%H Reinhard Zumkeller, <a href="/A030337/b030337.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o import Data.List (group)

%o a030337 n = a030337_list !! (n-1)

%o a030337_list = map length $ filter ((== 1) . head) $ group a003137_list

%o -- _Reinhard Zumkeller_, Feb 21 2013

%Y Cf. A030336, A030338, A030333.

%K nonn,base

%O 1,3

%A _Clark Kimberling_

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Last modified April 25 21:09 EDT 2024. Contains 371989 sequences. (Running on oeis4.)