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 A027869 Number of 0's in n!. 18
 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, 10, 8, 11, 9, 10, 12, 16, 12, 9, 15, 13, 13, 12, 13, 16, 11, 14, 14, 19, 18, 18, 17, 18, 18, 17, 20, 17, 19, 19, 26, 20, 21, 20, 20, 23, 22, 25, 21, 20, 25, 23, 35 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 LINKS T. D. Noe, Table of n, a(n) for n = 0..1000 FORMULA a(n) = A034886(n) - (A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). - Reinhard Zumkeller, Jan 27 2008 A027868(n) <= a(n). - Reinhard Zumkeller, Jan 27 2008 MATHEMATICA Table[Count[IntegerDigits[n!], 0], {n, 0, 100}] (* T. D. Noe, Apr 10 2012 *) PROG (PARI) a(n)=my(d=digits(n!)); sum(i=1, #d, d[i]==0) \\ Charles R Greathouse IV, Jul 06 2017 CROSSREFS Cf. A000142, A137579, A137580. Sequence in context: A255771 A115034 A253193 * A156748 A075445 A216612 Adjacent sequences:  A027866 A027867 A027868 * A027870 A027871 A027872 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified June 20 05:01 EDT 2019. Contains 324229 sequences. (Running on oeis4.)