A048631 as tables, graphs or sounds

A048631 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`24`
`5`		`120`
`6`		`272`
`7`		`1904`
`8`		`15232`
`9`		`124800`
`10`		`848640`
`11`		`7507200`
`12`		`39738368`
`13`		`433441792`
`14`		`2589116416`
`15`		`30419859456`
`16`		`486717751296`
`17`		`8128101580800`
`18`		`132557598294016`
`19`		`1971862458400768`
`20`		`30421253686034432`
`21`		`512675443057623040`

[1,1,2,6,24,120,272,1904,15232,124800,848640, 7507200,39738368,433441792,2589116416,30419859456, 486717751296,8128101580800,132557598294016, 1971862458400768,30421253686034432, 512675443057623040]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research