A020522 as tables, graphs or sounds

A020522 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`2`
`2`		`12`
`3`		`56`
`4`		`240`
`5`		`992`
`6`		`4032`
`7`		`16256`
`8`		`65280`
`9`		`261632`
`10`		`1047552`
`11`		`4192256`
`12`		`16773120`
`13`		`67100672`
`14`		`268419072`
`15`		`1073709056`
`16`		`4294901760`
`17`		`17179738112`
`18`		`68719214592`
`19`		`274877382656`
`20`		`1099510579200`
`21`		`4398044413952`
`22`		`17592181850112`

[0,2,12,56,240,992,4032,16256,65280,261632, 1047552,4192256,16773120,67100672,268419072, 1073709056,4294901760,17179738112,68719214592, 274877382656,1099510579200,4398044413952, 17592181850112]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research