A011968 as tables, graphs or sounds

A011968 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`3`
`3`		`7`
`4`		`20`
`5`		`67`
`6`		`255`
`7`		`1080`
`8`		`5017`
`9`		`25287`
`10`		`137122`
`11`		`794545`
`12`		`4892167`
`13`		`31858034`
`14`		`218543759`
`15`		`1573857867`
`16`		`11863100692`
`17`		`93345011951`
`18`		`764941675963`
`19`		`6514819011216`
`20`		`57556900440429`
`21`		`526593974392123`

[1,2,3,7,20,67,255,1080,5017,25287,137122,794545, 4892167,31858034,218543759,1573857867,11863100692, 93345011951,764941675963,6514819011216, 57556900440429,526593974392123]

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research