A081181 as tables, graphs or sounds

A081181 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`6`
`3`		`20`
`4`		`35`
`5`		`126`
`6`		`210`
`7`		`792`
`8`		`1287`
`9`		`5005`
`10`		`8008`
`11`		`31824`
`12`		`50388`
`13`		`203490`
`14`		`319770`
`15`		`1307504`
`16`		`2042975`
`17`		`8436285`
`18`		`13123110`
`19`		`54627300`
`20`		`84672315`
`21`		`354817320`
`22`		`548354040`
`23`		`2310789600`
`24`		`3562467300`
`25`		`15084504396`
`26`		`23206929840`
`27`		`98672427616`
`28`		`151532656696`

[1,3,6,20,35,126,210,792,1287,5005,8008,31824, 50388,203490,319770,1307504,2042975,8436285, 13123110,54627300,84672315,354817320,548354040, 2310789600,3562467300,15084504396,23206929840, 98672427616,151532656696]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research