A002861 as tables, graphs or sounds

A002861 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`4`
`4`		`9`
`5`		`20`
`6`		`51`
`7`		`125`
`8`		`329`
`9`		`862`
`10`		`2311`
`11`		`6217`
`12`		`16949`
`13`		`46350`
`14`		`127714`
`15`		`353272`
`16`		`981753`
`17`		`2737539`
`18`		`7659789`
`19`		`21492286`
`20`		`60466130`
`21`		`170510030`
`22`		`481867683`
`23`		`1364424829`
`24`		`3870373826`
`25`		`10996890237`
`26`		`31293083540`

[1,2,4,9,20,51,125,329,862,2311,6217,16949,46350, 127714,353272,981753,2737539,7659789,21492286, 60466130,170510030,481867683,1364424829, 3870373826,10996890237,31293083540]

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research