A135489 as tables, graphs or sounds

A135489 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`12`
`3`		`42`
`4`		`148`
`5`		`540`
`6`		`1990`
`7`		`7434`
`8`		`27972`
`9`		`106008`
`10`		`403764`
`11`		`1544796`
`12`		`5931486`
`13`		`22846252`
`14`		`88228998`
`15`		`341518606`
`16`		`1324627044`
`17`		`5146959168`
`18`		`20030812360`
`19`		`78066774400`
`20`		`304643526276`
`21`		`1190209498344`
`22`		`4654949367204`
`23`		`18223301727108`

[1,4,12,42,148,540,1990,7434,27972,106008,403764, 1544796,5931486,22846252,88228998,341518606, 1324627044,5146959168,20030812360,78066774400, 304643526276,1190209498344,4654949367204, 18223301727108]

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research