A097940 as tables, graphs or sounds

A097940 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`8`
`4`		`20`
`5`		`37`
`6`		`86`
`7`		`173`
`8`		`372`
`9`		`788`
`10`		`1680`
`11`		`3550`
`12`		`7554`
`13`		`15994`
`14`		`33820`
`15`		`71374`
`16`		`150376`
`17`		`316151`
`18`		`663474`
`19`		`1389760`
`20`		`2906116`
`21`		`6066899`
`22`		`12645608`
`23`		`26318870`
`24`		`54700044`
`25`		`113536171`
`26`		`235363832`
`27`		`487342781`
`28`		`1007969620`
`29`		`2082597193`
`30`		`4298660754`

[1,4,8,20,37,86,173,372,788,1680,3550,7554,15994, 33820,71374,150376,316151,663474,1389760,2906116, 6066899,12645608,26318870,54700044,113536171, 235363832,487342781,1007969620,2082597193, 4298660754]

Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

AT&T Labs Research