A053490 as tables, graphs or sounds

A053490 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`6`
`3`		`9`
`4`		`132`
`5`		`630`
`6`		`6642`
`7`		`55440`
`8`		`608976`
`9`		`6790392`
`10`		`85413960`
`11`		`1145077560`
`12`		`16600386888`
`13`		`256806229680`
`14`		`4233767671728`
`15`		`74015194485960`
`16`		`1368023697469440`
`17`		`26649263762049600`
`18`		`545697922821501888`
`19`		`11717708270380421760`
`20`		`263276186128105633920`

[1,0,6,9,132,630,6642,55440,608976,6790392, 85413960,1145077560,16600386888,256806229680, 4233767671728,74015194485960,1368023697469440, 26649263762049600,545697922821501888, 11717708270380421760,263276186128105633920]

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research