A002422 as tables, graphs or sounds

A002422 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`-10`
`2`		`30`
`3`		`-20`
`4`		`-10`
`5`		`-12`
`6`		`-20`
`7`		`-40`
`8`		`-90`
`9`		`-220`
`10`		`-572`
`11`		`-1560`
`12`		`-4420`
`13`		`-12920`
`14`		`-38760`
`15`		`-118864`
`16`		`-371450`
`17`		`-1179900`
`18`		`-3801900`
`19`		`-12406200`
`20`		`-40940460`
`21`		`-136468200`
`22`		`-459029400`
`23`		`-1556708400`
`24`		`-5318753700`
`25`		`-18296512728`
`26`		`-63334082520`

[1,-10,30,-20,-10,-12,-20,-40,-90,-220,-572,-1560, -4420,-12920,-38760,-118864,-371450,-1179900, -3801900,-12406200,-40940460,-136468200, -459029400,-1556708400,-5318753700,-18296512728, -63334082520]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research