A137578 Smallest of the least frequent digits in decimal representation of n!.

0, 0, 0, 0, 0, 3, 1, 1, 1, 1, 1, 2, 2, 1, 3, 2, 1, 1, 1, 7, 5, 3, 3, 1, 5, 6, 7, 2, 2, 2, 7, 3, 4, 2, 1, 8, 5, 8, 8, 5, 3, 9, 2, 4, 9, 8, 3, 7, 9, 9, 5, 4, 1, 1, 5, 7, 2, 3, 6, 5, 5, 1, 4, 5, 7, 1, 5, 3, 6, 6, 3, 4, 5, 9, 6, 3, 1, 5, 9, 4, 9, 3, 5, 8, 4, 8, 1, 6, 7, 4, 2, 3, 9, 9, 9, 1, 2, 4, 1, 7, 7

Offset

0,6

Comments

a(n) <= A137577(n).

Links

Table of n, a(n) for n=0..100.

Index entries for sequences related to factorial numbers.

Example

n=10: 10! = 3628800 => a(10) = Min{1,4,5,7,9} = 1;
n=11: 11! = 39916800 => a(11) = Min{2,4,5,7} = 2.

Crossrefs

Cf. A000142, A027869, A079680, A079714, A079684, A079688, A079690, A079691, A079692, A079693, A079694, A137579, A137580.

Sequence in context: A030380 A375932 A066636 * A200146 A319095 A109390

Adjacent sequences: A137575 A137576 A137577 * A137579 A137580 A137581

Keyword

nonn,base

Author

Reinhard Zumkeller, Jan 27 2008

Status

approved