A026306 as tables, graphs or sounds

A026306 formatted as a simple table:

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`12`
`4`		`69`
`5`		`392`
`6`		`2235`
`7`		`12804`
`8`		`73710`
`9`		`426192`
`10`		`2473704`
`11`		`14405800`
`12`		`84137130`
`13`		`492652824`
`14`		`2891110235`
`15`		`16999928820`
`16`		`100136858625`
`17`		`590778928800`
`18`		`3490370847876`
`19`		`20647839813048`
`20`		`122287764072938`
`21`		`725023671281520`
`22`		`4302720916638417`

[0,2,12,69,392,2235,12804,73710,426192,2473704, 14405800,84137130,492652824,2891110235, 16999928820,100136858625,590778928800, 3490370847876,20647839813048,122287764072938, 725023671281520,4302720916638417]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research