login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110453 Floor[Product of all k-digit numbers starting from n where k is the number of digits in n divided by product of all k-digit numbers less than n]. 0
362880, 362880, 90720, 10080, 630, 25, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

That is, a(n) = Floor[ n*(n+1)...*(10^k-1)/R, where k is the number of digits in n and R = (n-1)(n-2)...(10^(k-1)+1}{10^(k-1))].

Comment from David Wasserman, Dec 01 2008: There is no room for the next term, which is

257182031095525112107857249934597388918419224714455526533820998388496472\

644482792132224051962512451185663850090463028434334174412800000000000000\

0000000.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

a(5) = 5*6*7*8*9/(4!)=630.

CROSSREFS

Sequence in context: A263213 A109160 A269127 * A110452 A011520 A321845

Adjacent sequences:  A110450 A110451 A110452 * A110454 A110455 A110456

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 04 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 6 16:10 EST 2021. Contains 349565 sequences. (Running on oeis4.)