A129949 as tables, graphs or sounds

A129949 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`5`
`4`		`20`
`5`		`110`
`6`		`700`
`7`		`5005`
`8`		`40264`
`9`		`362796`
`10`		`3628680`
`11`		`39916635`
`12`		`479001380`
`13`		`6227020514`
`14`		`87178290836`
`15`		`1307674367545`
`16`		`20922789887440`
`17`		`355687428095320`
`18`		`6402373705727184`
`19`		`121645100408831031`
`20`		`2432902008176638860`

[1,2,5,20,110,700,5005,40264,362796,3628680, 39916635,479001380,6227020514,87178290836, 1307674367545,20922789887440,355687428095320, 6402373705727184,121645100408831031, 2432902008176638860]

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research