The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A108889 a(n) is n! divided by LCM of all composite numbers k such that n < k < prime(r) where prime(r-1)< n. 0
1, 2, 6, 24, 120, 720, 5040, 448, 36288, 3628800, 39916800, 479001600, 6227020800, 363242880, 81729648000, 20922789888000, 355687428096000, 6402373705728000, 121645100408832000, 5266021662720000, 2322315553259520000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
As every k divides n!, LCM of all k's divides n!.
LINKS
EXAMPLE
a(8) = 8!/gcd(9, 10) = 40320/90 = 448.
CROSSREFS
Cf. A109914.
Sequence in context: A177553 A090583 A248775 * A248772 A033645 A248769
KEYWORD
nonn,less
AUTHOR
Amarnath Murthy, Jul 16 2005
EXTENSIONS
Corrected and extended by David Wasserman, Mar 31 2008
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 13 15:00 EDT 2024. Contains 373389 sequences. (Running on oeis4.)