A002777 as tables, graphs or sounds

A002777 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`0`
`4`		`4`
`5`		`16`
`6`		`80`
`7`		`672`
`8`		`4896`
`9`		`49920`
`10`		`460032`
`11`		`5598720`
`12`		`62584320`
`13`		`885381120`
`14`		`11644323840`
`15`		`187811205120`
`16`		`2841958748160`
`17`		`51481298534400`
`18`		`881192033648640`
`19`		`17714783352913920`
`20`		`338434210452602880`
`21`		`7477275543168614400`

[1,0,0,0,4,16,80,672,4896,49920,460032,5598720, 62584320,885381120,11644323840,187811205120, 2841958748160,51481298534400,881192033648640, 17714783352913920,338434210452602880, 7477275543168614400]

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research