A079691 Number of 6's in n!.

0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 2, 0, 2, 1, 1, 2, 0, 2, 3, 2, 0, 4, 3, 2, 3, 3, 2, 5, 3, 4, 7, 2, 3, 5, 2, 3, 6, 5, 6, 5, 8, 4, 7, 6, 6, 9, 5, 8, 7, 3, 9, 6, 7, 4, 6, 8, 6, 6, 11, 6, 8, 8, 11, 6, 4, 11, 11, 10, 6, 5, 9, 8, 9, 8, 11, 10, 8, 11, 12, 13, 9, 11, 7, 12, 15, 15, 17, 8, 11, 16, 11

Offset

0,16

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) + A079692(n) + A079693(n) + A079694(n)). - Reinhard Zumkeller, Jan 27 2008

Mathematica

Table[DigitCount[n!, 10, 6], {n, 0, 100}] (* Harvey P. Dale, Aug 08 2023 *)

Crossrefs

Cf. A079714.

Cf. A000142, A137579, A137580.

Sequence in context: A024161 A035156 A063883 * A104450 A281460 A035226

Adjacent sequences: A079688 A079689 A079690 * A079692 A079693 A079694

Keyword

easy,nonn,base

Author

Cino Hilliard, Jan 31 2003

Status

approved