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A097688 Number of ones in the first n terms of A097686. 1

%I

%S 1,2,2,3,3,3,3,3,4,4,4,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,

%T 6,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,

%U 9,9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10

%N Number of ones in the first n terms of A097686.

%C a(n) = #{k: A097686(k)=1, 1<=k<=n}.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Aug 19 2004

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Last modified August 7 04:39 EDT 2020. Contains 336274 sequences. (Running on oeis4.)