A097900 as tables, graphs or sounds

A097900 formatted as a simple table:

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`7`
`4`		`32`
`5`		`180`
`6`		`1200`
`7`		`9240`
`8`		`80640`
`9`		`786240`
`10`		`8467200`
`11`		`99792000`
`12`		`1277337600`
`13`		`17643225600`
`14`		`261534873600`
`15`		`4140968832000`
`16`		`69742632960000`
`17`		`1244905998336000`
`18`		`23475370254336000`
`19`		`466306218233856000`
`20`		`9731608032706560000`

[1,2,7,32,180,1200,9240,80640,786240,8467200, 99792000,1277337600,17643225600,261534873600, 4140968832000,69742632960000,1244905998336000, 23475370254336000,466306218233856000, 9731608032706560000]

Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

AT&T Labs Research