A001654 as tables, graphs or sounds

A001654 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`15`
`5`		`40`
`6`		`104`
`7`		`273`
`8`		`714`
`9`		`1870`
`10`		`4895`
`11`		`12816`
`12`		`33552`
`13`		`87841`
`14`		`229970`
`15`		`602070`
`16`		`1576239`
`17`		`4126648`
`18`		`10803704`
`19`		`28284465`
`20`		`74049690`
`21`		`193864606`
`22`		`507544127`
`23`		`1328767776`
`24`		`3478759200`
`25`		`9107509825`
`26`		`23843770274`
`27`		`62423800998`
`28`		`163427632719`

[0,1,2,6,15,40,104,273,714,1870,4895,12816,33552, 87841,229970,602070,1576239,4126648,10803704, 28284465,74049690,193864606,507544127,1328767776, 3478759200,9107509825,23843770274,62423800998, 163427632719]

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

AT&T Labs Research