login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109100 Numbers n such that n! is the product of exactly 2 smaller factorials (greater than 1). 6
10, 16, 24, 48, 96, 144, 192, 288, 384, 720, 768, 864, 1440, 1536, 1728, 3072, 4320, 5184, 6144, 8640, 10368, 12288, 24576, 25920, 31104, 40320, 49152, 51840, 62208, 80640, 86400, 98304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..32.

EXAMPLE

10! = 3! * 5! * 7! = 6! * 7!, so 10 is in the sequence.

CROSSREFS

Cf. A034878, A001013, A003135, A058295, A075082, A109095, A109096, A109097, A109098, A109100, A109101, A109102, A109103.

Sequence in context: A055987 A187397 A152138 * A155151 A104788 A249720

Adjacent sequences:  A109097 A109098 A109099 * A109101 A109102 A109103

KEYWORD

nonn

AUTHOR

Jud McCranie, Jun 19 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 October 21 22:47 EDT 2019. Contains 328315 sequences. (Running on oeis4.)