A154030 as tables, graphs or sounds

A154030 formatted as a simple table:

`n`		`a(n)`
`0`		`0`
`1`		`2`
`2`		`6`
`3`		`12`
`4`		`16`
`5`		`120`
`6`		`30`
`7`		`1680`
`8`		`48`
`9`		`30240`
`10`		`70`
`11`		`665280`
`12`		`96`
`13`		`17297280`
`14`		`126`
`15`		`518918400`
`16`		`160`
`17`		`17643225600`
`18`		`198`
`19`		`670442572800`
`20`		`240`
`21`		`28158588057600`
`22`		`286`
`23`		`1295295050649600`
`24`		`336`
`25`		`64764752532480000`
`26`		`390`
`27`		`3497296636753920000`
`28`		`448`

[0,2,6,12,16,120,30,1680,48,30240,70,665280,96, 17297280,126,518918400,160,17643225600,198, 670442572800,240,28158588057600,286, 1295295050649600,336,64764752532480000,390, 3497296636753920000,448]

Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

AT&T Labs Research