A117581 as tables, graphs or sounds

A117581 formatted as a simple table:

`n`		`a(n)`
`1`		`2`
`2`		`9`
`3`		`81`
`4`		`4375`
`5`		`9801`
`6`		`123201`
`7`		`336141`
`8`		`11859211`
`9`		`11859211`
`10`		`177182721`
`11`		`1611308700`
`12`		`3463200000`
`13`		`63927525376`
`14`		`421138799640`
`15`		`1109496723126`
`16`		`1453579866025`
`17`		`20628591204481`
`18`		`31887350832897`
`19`		`31887350832897`
`20`		`119089041053697`

[2,9,81,4375,9801,123201,336141,11859211,11859211, 177182721,1611308700,3463200000,63927525376, 421138799640,1109496723126,1453579866025, 20628591204481,31887350832897,31887350832897, 119089041053697]

Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

AT&T Labs Research