A027826 as tables, graphs or sounds

A027826 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`4`
`4`		`9`
`5`		`21`
`6`		`50`
`7`		`120`
`8`		`290`
`9`		`706`
`10`		`1732`
`11`		`4280`
`12`		`10644`
`13`		`26612`
`14`		`66824`
`15`		`168384`
`16`		`425481`
`17`		`1077529`
`18`		`2733746`
`19`		`6945812`
`20`		`17669149`
`21`		`44994345`
`22`		`114682042`
`23`		`292544200`
`24`		`746831570`
`25`		`1907983346`
`26`		`4877966628`
`27`		`12479883736`
`28`		`31951158024`

[1,1,2,4,9,21,50,120,290,706,1732,4280,10644, 26612,66824,168384,425481,1077529,2733746,6945812, 17669149,44994345,114682042,292544200,746831570, 1907983346,4877966628,12479883736,31951158024]

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research