A000090 as tables, graphs or sounds

A000090 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`4`
`4`		`16`
`5`		`80`
`6`		`520`
`7`		`3640`
`8`		`29120`
`9`		`259840`
`10`		`2598400`
`11`		`28582400`
`12`		`343235200`
`13`		`4462057600`
`14`		`62468806400`
`15`		`936987251200`
`16`		`14991796019200`
`17`		`254860532326400`
`18`		`4587501779660800`
`19`		`87162533813555200`
`20`		`1743250676271104000`

[1,1,2,4,16,80,520,3640,29120,259840,2598400, 28582400,343235200,4462057600,62468806400, 936987251200,14991796019200,254860532326400, 4587501779660800,87162533813555200, 1743250676271104000]

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research