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A079680 Number of 1's in n!. 13

%I

%S 1,1,0,0,0,1,0,0,0,0,0,1,1,0,2,1,0,0,0,3,1,3,2,1,1,4,3,3,4,4,3,2,5,7,

%T 2,4,4,4,7,3,6,6,6,4,6,7,4,10,4,5,7,10,3,2,5,5,4,7,10,6,8,3,8,9,12,5,

%U 5,8,11,9,7,6,6,16,13,9,7,7,11,15,8,9,13,10,15,13,8,14,14,12,11,12,13,16,11

%N Number of 1's in n!.

%H <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>.

%F a(n) = A034886(n) - (A027869(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). - _Reinhard Zumkeller_, Jan 27 2008

%Y Cf. A000142, A137579, A137580.

%K easy,nonn,base

%O 0,15

%A _Cino Hilliard_, Jan 31 2003

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Last modified August 20 18:11 EDT 2019. Contains 326154 sequences. (Running on oeis4.)