A002999 as tables, graphs or sounds

A002999 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`18`
`4`		`56`
`5`		`170`
`6`		`492`
`7`		`1358`
`8`		`3600`
`9`		`9234`
`10`		`23060`
`11`		`56342`
`12`		`135192`
`13`		`319514`
`14`		`745500`
`15`		`1720350`
`16`		`3932192`
`17`		`8912930`
`18`		`20054052`
`19`		`44826662`
`20`		`99614760`
`21`		`220201002`
`22`		`484442156`
`23`		`1061158958`
`24`		`2315255856`
`25`		`5033164850`

[1,2,6,18,56,170,492,1358,3600,9234,23060,56342, 135192,319514,745500,1720350,3932192,8912930, 20054052,44826662,99614760,220201002,484442156, 1061158958,2315255856,5033164850]

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research