A033319 as tables, graphs or sounds

A033319 formatted as a simple table:

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`4`
`4`		`6`
`5`		`180`
`6`		`1820`
`7`		`3588`
`8`		`9100`
`9`		`226153980`
`10`		`15140424455100`
`11`		`183567298683461940`
`12`		`9562401173878027020`
`13`		`42094239791738433660`
`14`		`1238789998647218582160`
`15`		`189073995951839020880499780706260`

[0,2,4,6,180,1820,3588,9100,226153980, 15140424455100,183567298683461940, 9562401173878027020,42094239791738433660, 1238789998647218582160, 189073995951839020880499780706260]

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

AT&T Labs Research