A009423 - OEIS

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A009423 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`2`
`3`		`-6`
`4`		`14`
`5`		`-40`
`6`		`204`
`7`		`-1316`
`8`		`8728`
`9`		`-65472`
`10`		`587520`
`11`		`-5909024`
`12`		`63996096`
`13`		`-755614080`
`14`		`9771577984`
`15`		`-136347987712`
`16`		`2032096826880`
`17`		`-32315254874112`
`18`		`547193693896704`
`19`		`-9816654494863360`
`20`		`185846783267553280`
`21`		`-3704632705419493376`

[0,0,2,-6,14,-40,204,-1316,8728,-65472,587520, -5909024,63996096,-755614080,9771577984, -136347987712,2032096826880,-32315254874112, 547193693896704,-9816654494863360, 185846783267553280,-3704632705419493376]

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Last modified April 24 14:32 EDT 2024. Contains 371960 sequences. (Running on oeis4.)