A005430 as tables, graphs or sounds

A005430 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`2`
`2`		`12`
`3`		`60`
`4`		`280`
`5`		`1260`
`6`		`5544`
`7`		`24024`
`8`		`102960`
`9`		`437580`
`10`		`1847560`
`11`		`7759752`
`12`		`32449872`
`13`		`135207800`
`14`		`561632400`
`15`		`2326762800`
`16`		`9617286240`
`17`		`39671305740`
`18`		`163352435400`
`19`		`671560012200`
`20`		`2756930576400`
`21`		`11303415363240`
`22`		`46290177201840`

[0,2,12,60,280,1260,5544,24024,102960,437580, 1847560,7759752,32449872,135207800,561632400, 2326762800,9617286240,39671305740,163352435400, 671560012200,2756930576400,11303415363240, 46290177201840]

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

AT&T Labs Research