A061558 as tables, graphs or sounds

A061558 formatted as a simple table:

`n`		`a(n)`
`1`		`0`
`2`		`1`
`3`		`2`
`4`		`6`
`5`		`6`
`6`		`30`
`7`		`150`
`8`		`1210230`
`9`		`32671170`
`10`		`224494620`
`11`		`1536160080`
`12`		`1482708889200`
`13`		`9918821194590`
`14`		`266029822978920`
`15`		`266029822978920`
`16`		`11358256064006271420`
`17`		`341976204789992332560`

[0,1,2,6,6,30,150,1210230,32671170,224494620, 1536160080,1482708889200,9918821194590, 266029822978920,266029822978920, 11358256064006271420,341976204789992332560]

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research