A079680 Number of 1's in n!.

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

Offset

0,15

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) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). - Reinhard Zumkeller, Jan 27 2008

Crossrefs

Cf. A000142, A137579, A137580.

Sequence in context: A371417 A103294 A198379 * A380362 A037855 A037873

Adjacent sequences: A079677 A079678 A079679 * A079681 A079682 A079683

Keyword

easy,nonn,base

Author

Cino Hilliard, Jan 31 2003

Status

approved