A001564 as tables, graphs or sounds

A001564 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`14`
`3`		`78`
`4`		`504`
`5`		`3720`
`6`		`30960`
`7`		`287280`
`8`		`2943360`
`9`		`33022080`
`10`		`402796800`
`11`		`5308934400`
`12`		`75203251200`
`13`		`1139544806400`
`14`		`18394619443200`
`15`		`315149522688000`
`16`		`5711921639424000`
`17`		`109196040425472000`
`18`		`2196014181064704000`
`19`		`46346783255764992000`
`20`		`1024251745442365440000`

[1,3,14,78,504,3720,30960,287280,2943360,33022080, 402796800,5308934400,75203251200,1139544806400, 18394619443200,315149522688000,5711921639424000, 109196040425472000,2196014181064704000, 46346783255764992000,1024251745442365440000]

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research