A005809 as tables, graphs or sounds

A005809 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`3`
`2`		`15`
`3`		`84`
`4`		`495`
`5`		`3003`
`6`		`18564`
`7`		`116280`
`8`		`735471`
`9`		`4686825`
`10`		`30045015`
`11`		`193536720`
`12`		`1251677700`
`13`		`8122425444`
`14`		`52860229080`
`15`		`344867425584`
`16`		`2254848913647`
`17`		`14771069086725`
`18`		`96926348578605`
`19`		`636983969321700`
`20`		`4191844505805495`
`21`		`27619435402363035`

[1,3,15,84,495,3003,18564,116280,735471,4686825, 30045015,193536720,1251677700,8122425444, 52860229080,344867425584,2254848913647, 14771069086725,96926348578605,636983969321700, 4191844505805495,27619435402363035]

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

AT&T Labs Research