A007680 as tables, graphs or sounds

A007680 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`10`
`3`		`42`
`4`		`216`
`5`		`1320`
`6`		`9360`
`7`		`75600`
`8`		`685440`
`9`		`6894720`
`10`		`76204800`
`11`		`918086400`
`12`		`11975040000`
`13`		`168129561600`
`14`		`2528170444800`
`15`		`40537905408000`
`16`		`690452066304000`
`17`		`12449059983360000`
`18`		`236887827111936000`
`19`		`4744158915944448000`
`20`		`99748982335242240000`

[1,3,10,42,216,1320,9360,75600,685440,6894720, 76204800,918086400,11975040000,168129561600, 2528170444800,40537905408000,690452066304000, 12449059983360000,236887827111936000, 4744158915944448000,99748982335242240000]

Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research