A047657 as tables, graphs or sounds

A047657 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`16`
`3`		`224`
`4`		`4480`
`5`		`116480`
`6`		`3727360`
`7`		`141639680`
`8`		`6232145920`
`9`		`311607296000`
`10`		`17450008576000`
`11`		`1081900531712000`
`12`		`73569236156416000`
`13`		`5444123475574784000`
`14`		`435529878045982720000`
`15`		`37455569511954513920000`

[1,2,16,224,4480,116480,3727360,141639680, 6232145920,311607296000,17450008576000, 1081900531712000,73569236156416000, 5444123475574784000,435529878045982720000, 37455569511954513920000]

Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

AT&T Labs Research