A061640 as tables, graphs or sounds

A061640 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`4`
`3`		`24`
`4`		`240`
`5`		`4080`
`6`		`110880`
`7`		`4404960`
`8`		`238452480`
`9`		`16777393920`
`10`		`1484592883200`
`11`		`161180605555200`
`12`		`21054378333542400`
`13`		`3256459844769331200`
`14`		`588451470437627596800`
`15`		`122827588904844375552000`

[0,1,4,24,240,4080,110880,4404960,238452480, 16777393920,1484592883200,161180605555200, 21054378333542400,3256459844769331200, 588451470437627596800,122827588904844375552000]

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research