A005558 as tables, graphs or sounds - OEIS

A005558 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`3`
`3`		`6`
`4`		`20`
`5`		`50`
`6`		`175`
`7`		`490`
`8`		`1764`
`9`		`5292`
`10`		`19404`
`11`		`60984`
`12`		`226512`
`13`		`736164`
`14`		`2760615`
`15`		`9202050`
`16`		`34763300`
`17`		`118195220`
`18`		`449141836`
`19`		`1551580888`
`20`		`5924217936`
`21`		`20734762776`

[1,1,3,6,20,50,175,490,1764,5292,19404,60984, 226512,736164,2760615,9202050,34763300,118195220, 449141836,1551580888,5924217936,20734762776]

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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