A094821 as tables, graphs or sounds

A094821 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`15`
`4`		`54`
`5`		`190`
`6`		`660`
`7`		`2276`
`8`		`7816`
`9`		`26776`
`10`		`91600`
`11`		`313104`
`12`		`1069728`
`13`		`3653728`
`14`		`12477504`
`15`		`42606656`
`16`		`145479808`
`17`		`496722304`
`18`		`1695962368`
`19`		`5790470400`
`20`		`19770087936`
`21`		`67499673088`
`22`		`230459040768`
`23`		`786837865472`
`24`		`2686435477504`

[1,4,15,54,190,660,2276,7816,26776,91600,313104, 1069728,3653728,12477504,42606656,145479808, 496722304,1695962368,5790470400,19770087936, 67499673088,230459040768,786837865472, 2686435477504]

Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research