A000268 as tables, graphs or sounds

A000268 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`15`
`4`		`105`
`5`		`947`
`6`		`10472`
`7`		`137337`
`8`		`2085605`
`9`		`36017472`
`10`		`697407850`
`11`		`14969626900`
`12`		`352877606716`
`13`		`9064191508018`
`14`		`252024567201300`
`15`		`7542036496650006`
`16`		`241721880399970938`
`17`		`8261159383595659128`
`18`		`299916384730043070880`

[1,3,15,105,947,10472,137337,2085605,36017472, 697407850,14969626900,352877606716,9064191508018, 252024567201300,7542036496650006, 241721880399970938,8261159383595659128, 299916384730043070880]

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

AT&T Labs Research