A121551 as tables, graphs or sounds

A121551 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`8`
`4`		`19`
`5`		`44`
`6`		`98`
`7`		`213`
`8`		`457`
`9`		`965`
`10`		`2018`
`11`		`4183`
`12`		`8604`
`13`		`17594`
`14`		`35780`
`15`		`72428`
`16`		`146024`
`17`		`293335`
`18`		`587386`
`19`		`1172836`
`20`		`2335761`
`21`		`4640947`
`22`		`9201531`
`23`		`18208325`
`24`		`35967145`
`25`		`70929855`
`26`		`139667107`
`27`		`274630886`
`28`		`539309530`
`29`		`1057789244`
`30`		`2072370716`

[1,3,8,19,44,98,213,457,965,2018,4183,8604,17594, 35780,72428,146024,293335,587386,1172836,2335761, 4640947,9201531,18208325,35967145,70929855, 139667107,274630886,539309530,1057789244, 2072370716]

Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

AT&T Labs Research