A007971 as tables, graphs or sounds

A007971 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`2`
`3`		`2`
`4`		`4`
`5`		`8`
`6`		`18`
`7`		`42`
`8`		`102`
`9`		`254`
`10`		`646`
`11`		`1670`
`12`		`4376`
`13`		`11596`
`14`		`31022`
`15`		`83670`
`16`		`227268`
`17`		`621144`
`18`		`1706934`
`19`		`4713558`
`20`		`13072764`
`21`		`36398568`
`22`		`101704038`
`23`		`285095118`
`24`		`801526446`
`25`		`2259520830`
`26`		`6385455594`
`27`		`18086805002`
`28`		`51339636952`
`29`		`146015545604`

[0,1,2,2,4,8,18,42,102,254,646,1670,4376,11596, 31022,83670,227268,621144,1706934,4713558, 13072764,36398568,101704038,285095118,801526446, 2259520830,6385455594,18086805002,51339636952, 146015545604]

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

AT&T Labs Research