A138350 as tables, graphs or sounds

A138350 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`-1`
`2`		`3`
`3`		`-6`
`4`		`20`
`5`		`-50`
`6`		`175`
`7`		`-490`
`8`		`1764`
`9`		`-5292`
`10`		`19404`
`11`		`-60984`
`12`		`226512`
`13`		`-736164`
`14`		`2760615`
`15`		`-9202050`
`16`		`34763300`
`17`		`-118195220`
`18`		`449141836`
`19`		`-1551580888`
`20`		`5924217936`
`21`		`-20734762776`
`22`		`79483257308`
`23`		`-281248448936`
`24`		`1081724803600`
`25`		`-3863302870000`
`26`		`14901311070000`
`27`		`-53644719852000`

[1,-1,3,-6,20,-50,175,-490,1764,-5292,19404, -60984,226512,-736164,2760615,-9202050,34763300, -118195220,449141836,-1551580888,5924217936, -20734762776,79483257308,-281248448936, 1081724803600,-3863302870000,14901311070000, -53644719852000]

Last modified December 5 20:25 EST 2009. Contains 170428 sequences.

AT&T Labs Research