A053500 as tables, graphs or sounds

A053500 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`4`
`4`		`10`
`5`		`50`
`6`		`220`
`7`		`1240`
`8`		`6140`
`9`		`32860`
`10`		`602200`
`11`		`5668400`
`12`		`62030200`
`13`		`522328600`
`14`		`4487190800`
`15`		`62591332000`
`16`		`715163146000`
`17`		`9573774122000`
`18`		`105731659828000`
`19`		`1187355279592000`
`20`		`29205778751300000`
`21`		`481597207656340000`
`22`		`9086318388933400000`

[1,1,2,4,10,50,220,1240,6140,32860,602200,5668400, 62030200,522328600,4487190800,62591332000, 715163146000,9573774122000,105731659828000, 1187355279592000,29205778751300000, 481597207656340000,9086318388933400000]

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

AT&T Labs Research