A060897 as tables, graphs or sounds

A060897 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`12`
`3`		`44`
`4`		`144`
`5`		`528`
`6`		`1808`
`7`		`6676`
`8`		`23536`
`9`		`87568`
`10`		`315136`
`11`		`1180680`
`12`		`4314560`
`13`		`16263896`
`14`		`60138816`
`15`		`227899484`
`16`		`850600944`
`17`		`3238194560`
`18`		`12177384544`
`19`		`46542879384`
`20`		`176110444736`
`21`		`675431779856`
`22`		`2568878867200`
`23`		`9882068082112`

[1,4,12,44,144,528,1808,6676,23536,87568,315136, 1180680,4314560,16263896,60138816,227899484, 850600944,3238194560,12177384544,46542879384, 176110444736,675431779856,2568878867200, 9882068082112]

Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research