A050686 as tables, graphs or sounds

A050686 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`18`
`4`		`18`
`5`		`252`
`6`		`252`
`7`		`3168`
`8`		`3168`
`9`		`37512`
`10`		`37512`
`11`		`427608`
`12`		`427608`
`13`		`4748472`
`14`		`4748472`
`15`		`51736248`
`16`		`51736248`
`17`		`555626232`
`18`		`555626232`
`19`		`5900636088`
`20`		`5900636088`
`21`		`62105724792`
`22`		`62105724792`
`23`		`648951523128`
`24`		`648951523128`
`25`		`6740563708152`

[1,1,18,18,252,252,3168,3168,37512,37512,427608, 427608,4748472,4748472,51736248,51736248, 555626232,555626232,5900636088,5900636088, 62105724792,62105724792,648951523128,648951523128, 6740563708152]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research