A009408 - OEIS

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A009408 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`-1`
`3`		`-1`
`4`		`0`
`5`		`-31`
`6`		`75`
`7`		`-953`
`8`		`3976`
`9`		`-41631`
`10`		`255375`
`11`		`-2595825`
`12`		`21904344`
`13`		`-229744191`
`14`		`2548875147`
`15`		`-28954555113`
`16`		`403320390960`
`17`		`-5182050779583`
`18`		`86114063275263`
`19`		`-1283638256263905`
`20`		`24297343149251280`
`21`		`-420632032451656671`

[0,1,-1,-1,0,-31,75,-953,3976,-41631,255375, -2595825,21904344,-229744191,2548875147, -28954555113,403320390960,-5182050779583, 86114063275263,-1283638256263905, 24297343149251280,-420632032451656671]

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Last modified June 8 17:05 EDT 2024. Contains 373224 sequences. (Running on oeis4.)