A002868 as tables, graphs or sounds

A002868 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`36`
`5`		`240`
`6`		`1800`
`7`		`15120`
`8`		`141120`
`9`		`1693440`
`10`		`21772800`
`11`		`299376000`
`12`		`4390848000`
`13`		`68497228800`
`14`		`1133317785600`
`15`		`19833061248000`
`16`		`396661224960000`
`17`		`8299373322240000`
`18`		`181400588328960000`
`19`		`4135933413900288000`

[1,1,2,6,36,240,1800,15120,141120,1693440, 21772800,299376000,4390848000,68497228800, 1133317785600,19833061248000,396661224960000, 8299373322240000,181400588328960000, 4135933413900288000]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research