A049447 as tables, graphs or sounds

A049447 formatted as a simple table:

`n`		`a(n)`
`9`		`1`
`10`		`45`
`11`		`1155`
`12`		`22275`
`13`		`359502`
`14`		`5135130`
`15`		`67128490`
`16`		`820784250`
`17`		`9528822303`
`18`		`106175395755`
`19`		`1144614626805`
`20`		`12011282644725`
`21`		`123272476465204`
`22`		`1241963303533920`
`23`		`12320068811796900`
`24`		`120622574326072500`

[1,45,1155,22275,359502,5135130,67128490, 820784250,9528822303,106175395755,1144614626805, 12011282644725,123272476465204,1241963303533920, 12320068811796900,120622574326072500]

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research