A104631 as tables, graphs or sounds

A104631 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`4`
`3`		`18`
`4`		`80`
`5`		`365`
`6`		`1686`
`7`		`7875`
`8`		`37080`
`9`		`175725`
`10`		`837100`
`11`		`4004770`
`12`		`19227924`
`13`		`92599533`
`14`		`447118140`
`15`		`2163837030`
`16`		`10492874384`
`17`		`50972030189`
`18`		`248000853348`
`19`		`1208335275170`
`20`		`5894873067200`
`21`		`28791371852145`
`22`		`140768761906190`

[0,1,4,18,80,365,1686,7875,37080,175725,837100, 4004770,19227924,92599533,447118140,2163837030, 10492874384,50972030189,248000853348, 1208335275170,5894873067200,28791371852145, 140768761906190]

Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

AT&T Labs Research