A026991 as tables, graphs or sounds - OEIS

A026991 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`20`
`4`		`98`
`5`		`502`
`6`		`2126`
`7`		`8382`
`8`		`39624`
`9`		`203562`
`10`		`922944`
`11`		`3886840`
`12`		`18431462`
`13`		`93930404`
`14`		`435553556`
`15`		`1893481706`
`16`		`9028569112`
`17`		`45794495192`
`18`		`214665970468`
`19`		`950426429104`

[1,2,6,20,98,502,2126,8382,39624,203562,922944, 3886840,18431462,93930404,435553556,1893481706, 9028569112,45794495192,214665970468,950426429104]

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Last modified December 5 20:25 EST 2009. Contains 170428 sequences.

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