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A079692 Number of 7's in n!. 13

%I

%S 0,0,0,0,0,0,1,0,0,0,0,0,1,1,2,2,1,1,3,0,1,2,6,2,1,0,0,1,1,3,0,4,1,1,

%T 2,2,4,3,4,4,4,3,3,4,4,4,1,2,8,5,5,3,8,5,7,4,9,4,4,7,7,6,8,8,3,9,8,6,

%U 8,8,9,10,12,7,7,9,9,7,1,0,10,9,14,11,12,9,7,13,17,2,11,12,19,15,12,10,15

%N Number of 7'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) + A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079693(n) + A079694(n)). - _Reinhard Zumkeller_, Jan 27 2008

%Y Cf. A079714.

%Y Cf. A000142, A137579, A137580.

%K easy,nonn

%O 0,15

%A _Cino Hilliard_, Jan 31 2003

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Last modified September 16 18:24 EDT 2019. Contains 327116 sequences. (Running on oeis4.)