A104561 as tables, graphs or sounds

A104561 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`-1`
`2`		`1`
`3`		`-2`
`4`		`6`
`5`		`-30`
`6`		`204`
`7`		`-1944`
`8`		`23340`
`9`		`-360060`
`10`		`6692280`
`11`		`-151908120`
`12`		`4032593040`
`13`		`-126425330640`
`14`		`4537069829880`
`15`		`-187762669281600`
`16`		`8751745668796200`
`17`		`-462088269954518760`
`18`		`27132285729049971120`
`19`		`-1779812144439507990000`
`20`		`128512316060872730854560`

[1,-1,1,-2,6,-30,204,-1944,23340,-360060,6692280, -151908120,4032593040,-126425330640,4537069829880, -187762669281600,8751745668796200, -462088269954518760,27132285729049971120, -1779812144439507990000,128512316060872730854560]

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

AT&T Labs Research