A068875 as tables, graphs or sounds

A068875 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`10`
`4`		`28`
`5`		`84`
`6`		`264`
`7`		`858`
`8`		`2860`
`9`		`9724`
`10`		`33592`
`11`		`117572`
`12`		`416024`
`13`		`1485800`
`14`		`5348880`
`15`		`19389690`
`16`		`70715340`
`17`		`259289580`
`18`		`955277400`
`19`		`3534526380`
`20`		`13128240840`
`21`		`48932534040`
`22`		`182965127280`
`23`		`686119227300`
`24`		`2579808294648`
`25`		`9723892802904`

[1,2,4,10,28,84,264,858,2860,9724,33592,117572, 416024,1485800,5348880,19389690,70715340, 259289580,955277400,3534526380,13128240840, 48932534040,182965127280,686119227300, 2579808294648,9723892802904]

Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

AT&T Labs Research