A001559 as tables, graphs or sounds

A001559 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`15`
`3`		`54`
`4`		`193`
`5`		`690`
`6`		`2476`
`7`		`8928`
`8`		`32358`
`9`		`117866`
`10`		`431381`
`11`		`1585842`
`12`		`5853849`
`13`		`21690378`
`14`		`80650536`
`15`		`300845232`
`16`		`1125555054`
`17`		`4222603968`
`18`		`15881652606`
`19`		`59873283372`
`20`		`226214536506`
`21`		`856431978324`
`22`		`3248562071800`
`23`		`12344168149224`

[1,4,15,54,193,690,2476,8928,32358,117866,431381, 1585842,5853849,21690378,80650536,300845232, 1125555054,4222603968,15881652606,59873283372, 226214536506,856431978324,3248562071800, 12344168149224]

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research