A002424 as tables, graphs or sounds

A002424 formatted as a simple table:

`n`		`a(n)`
`0`		`1`
`1`		`-18`
`2`		`126`
`3`		`-420`
`4`		`630`
`5`		`-252`
`6`		`-84`
`7`		`-72`
`8`		`-90`
`9`		`-140`
`10`		`-252`
`11`		`-504`
`12`		`-1092`
`13`		`-2520`
`14`		`-6120`
`15`		`-15504`
`16`		`-40698`
`17`		`-110124`
`18`		`-305900`
`19`		`-869400`
`20`		`-2521260`
`21`		`-7443720`
`22`		`-22331160`
`23`		`-67964400`
`24`		`-209556900`
`25`		`-653817528`
`26`		`-2062039896`
`27`		`-6567978928`
`28`		`-21111360840`

[1,-18,126,-420,630,-252,-84,-72,-90,-140,-252, -504,-1092,-2520,-6120,-15504,-40698,-110124, -305900,-869400,-2521260,-7443720,-22331160, -67964400,-209556900,-653817528,-2062039896, -6567978928,-21111360840]

Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research