A000581 as tables, graphs or sounds

A000581 formatted as a simple table:

`n`		`a(n)`
`8`		`1`
`9`		`9`
`10`		`45`
`11`		`165`
`12`		`495`
`13`		`1287`
`14`		`3003`
`15`		`6435`
`16`		`12870`
`17`		`24310`
`18`		`43758`
`19`		`75582`
`20`		`125970`
`21`		`203490`
`22`		`319770`
`23`		`490314`
`24`		`735471`
`25`		`1081575`
`26`		`1562275`
`27`		`2220075`
`28`		`3108105`
`29`		`4292145`
`30`		`5852925`
`31`		`7888725`
`32`		`10518300`
`33`		`13884156`
`34`		`18156204`
`35`		`23535820`
`36`		`30260340`
`37`		`38608020`

[1,9,45,165,495,1287,3003,6435,12870,24310,43758, 75582,125970,203490,319770,490314,735471,1081575, 1562275,2220075,3108105,4292145,5852925,7888725, 10518300,13884156,18156204,23535820,30260340, 38608020]

Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research