A001813 as tables, graphs or sounds

A001813 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`12`
`3`		`120`
`4`		`1680`
`5`		`30240`
`6`		`665280`
`7`		`17297280`
`8`		`518918400`
`9`		`17643225600`
`10`		`670442572800`
`11`		`28158588057600`
`12`		`1295295050649600`
`13`		`64764752532480000`
`14`		`3497296636753920000`
`15`		`202843204931727360000`
`16`		`12576278705767096320000`

[1,2,12,120,1680,30240,665280,17297280,518918400, 17643225600,670442572800,28158588057600, 1295295050649600,64764752532480000, 3497296636753920000,202843204931727360000, 12576278705767096320000]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research