A062561 as tables, graphs or sounds

A062561 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`3`
`2`		`12`
`3`		`45`
`4`		`168`
`5`		`630`
`6`		`2376`
`7`		`9009`
`8`		`34320`
`9`		`131274`
`10`		`503880`
`11`		`1939938`
`12`		`7488432`
`13`		`28973100`
`14`		`112326480`
`15`		`436268025`
`16`		`1697168160`
`17`		`6611884290`
`18`		`25792489800`
`19`		`100734001830`
`20`		`393847225200`
`21`		`1541374822260`
`22`		`6037849200240`
`23`		`23671113341850`

[0,3,12,45,168,630,2376,9009,34320,131274,503880, 1939938,7488432,28973100,112326480,436268025, 1697168160,6611884290,25792489800,100734001830, 393847225200,1541374822260,6037849200240, 23671113341850]

Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

AT&T Labs Research