A054993 as tables, graphs or sounds

A054993 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`8`
`3`		`42`
`4`		`260`
`5`		`1796`
`6`		`13396`
`7`		`105706`
`8`		`870772`
`9`		`7420836`
`10`		`65004584`
`11`		`582521748`
`12`		`5320936416`
`13`		`49402687392`
`14`		`465189744448`
`15`		`4434492302426`
`16`		`42731740126228`
`17`		`415736458808868`
`18`		`4079436831493480`
`19`		`40338413922226212`
`20`		`401652846850965808`
`21`		`4024556509468827432`
`22`		`40558226664529024000`

[1,2,8,42,260,1796,13396,105706,870772,7420836, 65004584,582521748,5320936416,49402687392, 465189744448,4434492302426,42731740126228, 415736458808868,4079436831493480, 40338413922226212,401652846850965808, 4024556509468827432,40558226664529024000]

Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research