A002898 as tables, graphs or sounds

A002898 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`6`
`3`		`12`
`4`		`90`
`5`		`360`
`6`		`2040`
`7`		`10080`
`8`		`54810`
`9`		`290640`
`10`		`1588356`
`11`		`8676360`
`12`		`47977776`
`13`		`266378112`
`14`		`1488801600`
`15`		`8355739392`
`16`		`47104393050`
`17`		`266482019232`
`18`		`1512589408044`
`19`		`8610448069080`
`20`		`49144928795820`
`21`		`281164160225520`

[1,0,6,12,90,360,2040,10080,54810,290640,1588356, 8676360,47977776,266378112,1488801600,8355739392, 47104393050,266482019232,1512589408044, 8610448069080,49144928795820,281164160225520]

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research