A020084 as tables, graphs or sounds

A020084 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`1`
`4`		`4`
`5`		`20`
`6`		`108`
`7`		`694`
`8`		`5142`
`9`		`43193`
`10`		`406016`
`11`		`4222569`
`12`		`48137291`
`13`		`596902408`
`14`		`7998492273`
`15`		`115178288736`
`16`		`1773745646539`
`17`		`29089428603255`
`18`		`506156057696641`
`19`		`9313271461618195`
`20`		`180677466355392995`
`21`		`3685820313650017111`

[1,0,0,1,4,20,108,694,5142,43193,406016,4222569, 48137291,596902408,7998492273,115178288736, 1773745646539,29089428603255,506156057696641, 9313271461618195,180677466355392995, 3685820313650017111]

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

AT&T Labs Research