A047890 as tables, graphs or sounds

A047890 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`24`
`5`		`120`
`6`		`719`
`7`		`5003`
`8`		`39429`
`9`		`344837`
`10`		`3291590`
`11`		`33835114`
`12`		`370531683`
`13`		`4285711539`
`14`		`51990339068`
`15`		`657723056000`
`16`		`8636422912277`
`17`		`117241501095189`
`18`		`1639974912709122`
`19`		`23570308719710838`
`20`		`347217077020664880`

[1,2,6,24,120,719,5003,39429,344837,3291590, 33835114,370531683,4285711539,51990339068, 657723056000,8636422912277,117241501095189, 1639974912709122,23570308719710838, 347217077020664880]

Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research