A057409 as tables, graphs or sounds

A057409 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`19`
`5`		`63`
`6`		`216`
`7`		`756`
`8`		`2685`
`9`		`9650`
`10`		`35018`
`11`		`128084`
`12`		`471623`
`13`		`1746492`
`14`		`6499356`
`15`		`24290272`
`16`		`91123171`
`17`		`342984175`
`18`		`1294829776`
`19`		`4901319978`
`20`		`18597856445`
`21`		`70723784744`
`22`		`269486503694`
`23`		`1028736811230`
`24`		`3933715966653`

[1,2,6,19,63,216,756,2685,9650,35018,128084, 471623,1746492,6499356,24290272,91123171, 342984175,1294829776,4901319978,18597856445, 70723784744,269486503694,1028736811230, 3933715966653]

Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

AT&T Labs Research