Search: id:A027869
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%I A027869
%S A027869 0,0,0,0,0,1,1,2,2,1,2,2,4,4,2,4,4,4,5,6,7,7,8,5,6,9,8,9,10,7,9,7,
%T A027869 10,8,11,9,10,12,16,12,9,15,13,13,12,13,16,11,14,14,19,18,18,17,18,
%U A027869 18,17,20,17
%N A027869 Number of 0's in n!.
%H A027869 <a href="Sindx_Fa.html#factorial">Index entries for sequences related 
               to factorial numbers</a>.
%F A027869 a(n) = A034886(n) - (A079680(n) + A079714(n) + A079684(n) + A079688(n) 
               + A079690(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). 
               - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 27 2008
%F A027869 A027868(n) <= a(n). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               Jan 27 2008
%Y A027869 Cf. A000142, A137579, A137580.
%Y A027869 Sequence in context: A070215 A071457 A115034 this_sequence A156748 A075445 
               A023572
%Y A027869 Adjacent sequences: A027866 A027867 A027868 this_sequence A027870 A027871 
               A027872
%K A027869 nonn,base
%O A027869 0,8
%A A027869 N. J. A. Sloane (njas(AT)research.att.com).

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