A055544 as tables, graphs or sounds

A055544 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`16`
`5`		`45`
`6`		`120`
`7`		`336`
`8`		`920`
`9`		`2574`
`10`		`7190`
`11`		`20262`
`12`		`57192`
`13`		`162318`
`14`		`461622`
`15`		`1317165`
`16`		`3766096`
`17`		`10792399`
`18`		`30980862`
`19`		`89084844`
`20`		`256524560`
`21`		`739658472`
`22`		`2135213982`
`23`		`6170505665`
`24`		`17849399616`
`25`		`51679366125`
`26`		`149750549260`
`27`		`434260826883`

[1,2,6,16,45,120,336,920,2574,7190,20262,57192, 162318,461622,1317165,3766096,10792399,30980862, 89084844,256524560,739658472,2135213982, 6170505665,17849399616,51679366125,149750549260, 434260826883]

Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

AT&T Labs Research