A026270 as tables, graphs or sounds

A026270 formatted as a simple table:

`n`		`a(n)`
`2`		`1`
`3`		`2`
`4`		`6`
`5`		`15`
`6`		`39`
`7`		`102`
`8`		`270`
`9`		`721`
`10`		`1941`
`11`		`5262`
`12`		`14354`
`13`		`39372`
`14`		`108528`
`15`		`300482`
`16`		`835278`
`17`		`2330334`
`18`		`6522882`
`19`		`18313542`
`20`		`51559506`
`21`		`145530291`
`22`		`411738723`
`23`		`1167450066`
`24`		`3316925794`
`25`		`9441771081`
`26`		`26923831029`
`27`		`76901809810`
`28`		`219992462862`
`29`		`630245628681`
`30`		`1808029517585`

[1,2,6,15,39,102,270,721,1941,5262,14354,39372, 108528,300482,835278,2330334,6522882,18313542, 51559506,145530291,411738723,1167450066, 3316925794,9441771081,26923831029,76901809810, 219992462862,630245628681,1808029517585]

Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research