A002550 as tables, graphs or sounds

A002550 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`24`
`4`		`12`
`5`		`640`
`6`		`1920`
`7`		`107520`
`8`		`1792`
`9`		`2064384`
`10`		`10321920`
`11`		`43253760`
`12`		`64880640`
`13`		`5398069248`
`14`		`4198498304`
`15`		`503819796480`
`16`		`62977474560`
`17`		`16610786017280`
`18`		`4271344975872`
`19`		`649244436332544`
`20`		`41618233098240`
`21`		`27967452642017280`

[1,1,24,12,640,1920,107520,1792,2064384,10321920, 43253760,64880640,5398069248,4198498304, 503819796480,62977474560,16610786017280, 4271344975872,649244436332544,41618233098240, 27967452642017280]

Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research