A121635 as tables, graphs or sounds

A121635 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`8`
`4`		`42`
`5`		`264`
`6`		`1920`
`7`		`15840`
`8`		`146160`
`9`		`1491840`
`10`		`16692480`
`11`		`203212800`
`12`		`2674425600`
`13`		`37841126400`
`14`		`572885913600`
`15`		`9240898867200`
`16`		`158228598528000`
`17`		`2866422214656000`
`18`		`54775863926784000`
`19`		`1101208277385216000`

[1,2,8,42,264,1920,15840,146160,1491840,16692480, 203212800,2674425600,37841126400,572885913600, 9240898867200,158228598528000,2866422214656000, 54775863926784000,1101208277385216000]

Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

AT&T Labs Research