A060900 as tables, graphs or sounds

A060900 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`7`
`3`		`21`
`4`		`78`
`5`		`260`
`6`		`988`
`7`		`3458`
`8`		`13300`
`9`		`47880`
`10`		`185535`
`11`		`680295`
`12`		`2649570`
`13`		`9841260`
`14`		`38470380`
`15`		`144263925`
`16`		`565514586`
`17`		`2136388436`
`18`		`8392954570`
`19`		`31893227366`
`20`		`125515281892`
`21`		`479240167224`
`22`		`1888770070824`
`23`		`7240285271492`

[1,2,7,21,78,260,988,3458,13300,47880,185535, 680295,2649570,9841260,38470380,144263925, 565514586,2136388436,8392954570,31893227366, 125515281892,479240167224,1888770070824, 7240285271492]

Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

AT&T Labs Research