A109100 Numbers n such that n! is the product of exactly 2 smaller factorials (greater than 1).

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

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