A074859 as tables, graphs or sounds

A074859 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`6`
`5`		`20`
`6`		`240`
`7`		`420`
`8`		`2688`
`9`		`18144`
`10`		`120960`
`11`		`2661120`
`12`		`7983360`
`13`		`103783680`
`14`		`1037836800`
`15`		`12454041600`
`16`		`149448499200`
`17`		`1693749657600`
`18`		`60974987673600`
`19`		`289631191449600`
`20`		`5792623828992000`
`21`		`121645100408832000`
`22`		`3568256278659072000`
`23`		`30776210403434496000`
`24`		`738629049682427904000`
`25`		`12310484161373798400000`

[1,1,2,6,20,240,420,2688,18144,120960,2661120, 7983360,103783680,1037836800,12454041600, 149448499200,1693749657600,60974987673600, 289631191449600,5792623828992000, 121645100408832000,3568256278659072000, 30776210403434496000,738629049682427904000, 12310484161373798400000]

Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research