A008405 - OEIS

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A008405 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`-2`
`3`		`3`
`4`		`4`
`5`		`-90`
`6`		`786`
`7`		`-5670`
`8`		`34784`
`9`		`-136584`
`10`		`-824760`
`11`		`33137280`
`12`		`-633666648`
`13`		`10089623544`
`14`		`-145675230960`
`15`		`1910939579640`
`16`		`-21215723677440`
`17`		`136130901474240`
`18`		`2280768466608576`
`19`		`-135531682778927808`
`20`		`4380044490023909760`
`21`		`-119144344839822570240`

[1,1,-2,3,4,-90,786,-5670,34784,-136584,-824760, 33137280,-633666648,10089623544,-145675230960, 1910939579640,-21215723677440,136130901474240, 2280768466608576,-135531682778927808, 4380044490023909760,-119144344839822570240]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)