A079693 Number of 8's in n!.

0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 1, 0, 1, 2, 1, 4, 2, 1, 2, 1, 0, 1, 4, 1, 2, 1, 6, 4, 2, 5, 6, 2, 8, 2, 1, 3, 2, 0, 7, 4, 2, 4, 2, 9, 3, 7, 4, 4, 7, 5, 5, 9, 8, 9, 4, 11, 7, 10, 9, 4, 11, 7, 7, 12, 7, 9, 9, 7, 8, 14, 18, 15, 9, 9, 10, 8, 18, 12, 14, 13, 8, 10, 8, 12, 5, 8, 8, 18, 10, 14, 9, 11, 12, 16

Offset

0,10

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Index entries for sequences related to factorial numbers.

Formula

a(n) = A034886(n) - (A027869(n) + A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079694(n)). - Reinhard Zumkeller, Jan 27 2008

Mathematica

Table[DigitCount[n!, 10, 8], {n, 0, 100}] (* Harvey P. Dale, May 06 2016 *)

Crossrefs

Cf. A079714.

Cf. A000142, A137579, A137580.

Sequence in context: A193804 A180424 A092339 * A117444 A257145 A253262

Adjacent sequences: A079690 A079691 A079692 * A079694 A079695 A079696

Keyword

nonn,base,easy

Author

Cino Hilliard, Jan 31 2003

Status

approved