A003040 as tables, graphs or sounds

A003040 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`3`
`5`		`6`
`6`		`16`
`7`		`35`
`8`		`90`
`9`		`216`
`10`		`768`
`11`		`2310`
`12`		`7700`
`13`		`21450`
`14`		`69498`
`15`		`292864`
`16`		`1153152`
`17`		`4873050`
`18`		`16336320`
`19`		`64664600`
`20`		`249420600`
`21`		`1118939184`
`22`		`5462865408`
`23`		`28542158568`
`24`		`117487079424`
`25`		`547591590000`
`26`		`2474843571200`
`27`		`12760912164000`
`28`		`57424104738000`
`29`		`295284192942320`

[1,1,2,3,6,16,35,90,216,768,2310,7700,21450,69498, 292864,1153152,4873050,16336320,64664600, 249420600,1118939184,5462865408,28542158568, 117487079424,547591590000,2474843571200, 12760912164000,57424104738000,295284192942320]

Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

AT&T Labs Research