A015680 - OEIS

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A015680 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`-1`
`2`		`3`
`3`		`-15`
`4`		`81`
`5`		`-585`
`6`		`4995`
`7`		`-46935`
`8`		`499905`
`9`		`-6109425`
`10`		`79791075`
`11`		`-1138096575`
`12`		`17774982225`
`13`		`-294439570425`
`14`		`5240530570275`
`15`		`-100050497922375`
`16`		`2002010508122625`
`17`		`-42495475420022625`
`18`		`954152290944727875`

[1,-1,3,-15,81,-585,4995,-46935,499905,-6109425, 79791075,-1138096575,17774982225,-294439570425, 5240530570275,-100050497922375,2002010508122625, -42495475420022625,954152290944727875]

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Last modified September 6 17:04 EDT 2024. Contains 375715 sequences. (Running on oeis4.)