A007661 as tables, graphs or sounds

A007661 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`3`
`4`		`4`
`5`		`10`
`6`		`18`
`7`		`28`
`8`		`80`
`9`		`162`
`10`		`280`
`11`		`880`
`12`		`1944`
`13`		`3640`
`14`		`12320`
`15`		`29160`
`16`		`58240`
`17`		`209440`
`18`		`524880`
`19`		`1106560`
`20`		`4188800`
`21`		`11022480`
`22`		`24344320`
`23`		`96342400`
`24`		`264539520`
`25`		`608608000`
`26`		`2504902400`
`27`		`7142567040`
`28`		`17041024000`
`29`		`72642169600`

[1,1,2,3,4,10,18,28,80,162,280,880,1944,3640, 12320,29160,58240,209440,524880,1106560,4188800, 11022480,24344320,96342400,264539520,608608000, 2504902400,7142567040,17041024000,72642169600]

Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research