

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



