A001572 as tables, graphs or sounds

A001572 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`3`
`5`		`5`
`6`		`17`
`7`		`41`
`8`		`127`
`9`		`365`
`10`		`1119`
`11`		`3413`
`12`		`10685`
`13`		`33561`
`14`		`106827`
`15`		`342129`
`16`		`1104347`
`17`		`3584649`
`18`		`11701369`
`19`		`38374065`
`20`		`126395259`
`21`		`417908329`
`22`		`1386618307`
`23`		`4615388353`
`24`		`15407188529`
`25`		`51569669429`
`26`		`173033992311`
`27`		`581905285089`
`28`		`1961034571967`

[1,1,1,1,3,5,17,41,127,365,1119,3413,10685,33561, 106827,342129,1104347,3584649,11701369,38374065, 126395259,417908329,1386618307,4615388353, 15407188529,51569669429,173033992311,581905285089, 1961034571967]

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research