A109034 as tables, graphs or sounds

A109034 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`4`
`4`		`16`
`5`		`66`
`6`		`280`
`7`		`1216`
`8`		`5384`
`9`		`24224`
`10`		`110464`
`11`		`509480`
`12`		`2372704`
`13`		`11142656`
`14`		`52709600`
`15`		`250933120`
`16`		`1201354240`
`17`		`5780413760`
`18`		`27937867520`
`19`		`135574988800`
`20`		`660314620160`
`21`		`3226731934720`
`22`		`15815752724480`
`23`		`77735943378560`

[1,0,1,4,16,66,280,1216,5384,24224,110464,509480, 2372704,11142656,52709600,250933120,1201354240, 5780413760,27937867520,135574988800,660314620160, 3226731934720,15815752724480,77735943378560]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research