A174807 Floor(10^n/4) - A173228(n).

0, 1, 1, 1, 1, 2, 1, 1, 2, 3, 3, 3, 3, 2, 3, 4, 5, 5, 5, 4, 3, 5, 6, 7, 5, 8, 8, 6, 8, 10, 10, 8, 6, 7, 8, 8, 10, 7, 9, 9, 10, 11, 10, 9, 10, 9, 11, 11, 11, 11, 12, 13, 13, 12, 14, 10, 14, 17, 15, 13, 13, 12, 15, 14, 16, 15, 12, 14, 15, 15, 16, 15, 15, 15, 16, 13, 12, 16, 17, 14, 20, 20, 20

Offset

1,6

Comments

a(n) = A055223(n) if n>1.

Links

Table of n, a(n) for n=1..83.

Antonio M. Oller-Marcen, José María Grau, On the base b expansion of the number of trailing zeros of b^k!, arXiv:1002.4175 [math.NT], 2010, and J. Int. Seq. 14 (2011) 11.6.8

Crossrefs

Sequence in context: A051631 A073725 A055223 * A376939 A181572 A287731

Adjacent sequences: A174804 A174805 A174806 * A174808 A174809 A174810

Keyword

easy,nonn

Author

José María Grau Ribas, Mar 29 2010

Status

approved