A020115 as tables, graphs or sounds

A020115 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`5`
`4`		`19`
`5`		`90`
`6`		`524`
`7`		`3599`
`8`		`28342`
`9`		`251532`
`10`		`2483878`
`11`		`27012164`
`12`		`320769441`
`13`		`4129906549`
`14`		`57302453361`
`15`		`852373993745`
`16`		`13531437150693`
`17`		`228343001917932`
`18`		`4081631159283028`
`19`		`77040788131467136`
`20`		`1531185664112909315`

[1,1,2,5,19,90,524,3599,28342,251532,2483878, 27012164,320769441,4129906549,57302453361, 852373993745,13531437150693,228343001917932, 4081631159283028,77040788131467136, 1531185664112909315]

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research