A008556 as tables, graphs or sounds

A008556 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`2`
`4`		`20`
`5`		`12`
`6`		`70`
`7`		`60`
`8`		`6`
`9`		`252`
`10`		`280`
`11`		`60`
`12`		`924`
`13`		`1260`
`14`		`420`
`15`		`20`
`16`		`3432`
`17`		`5544`
`18`		`2520`
`19`		`280`
`20`		`12870`
`21`		`24024`
`22`		`13860`
`23`		`2520`
`24`		`70`
`25`		`48620`
`26`		`102960`
`27`		`72072`
`28`		`18480`
`29`		`1260`
`30`		`184756`
`31`		`437580`
`32`		`360360`
`33`		`120120`
`34`		`13860`
`35`		`252`
`36`		`705432`
`37`		`1847560`
`38`		`1750320`
`39`		`720720`
`40`		`120120`
`41`		`5544`

[1,2,6,2,20,12,70,60,6,252,280,60,924,1260,420,20, 3432,5544,2520,280,12870,24024,13860,2520,70, 48620,102960,72072,18480,1260,184756,437580, 360360,120120,13860,252,705432,1847560,1750320, 720720,120120,5544]

Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research