A155456 - OEIS

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A155456 as a simple table

`n`		`a(n)`
`0`		`-1`
`1`		`-1`
`2`		`1`
`3`		`-2`
`4`		`6`
`5`		`-24`
`6`		`120`
`7`		`-720`
`8`		`5040`
`9`		`-40320`
`10`		`362880`
`11`		`-3628800`
`12`		`39916800`
`13`		`-479001600`
`14`		`6227020800`
`15`		`-87178291200`
`16`		`1307674368000`
`17`		`-20922789888000`
`18`		`355687428096000`
`19`		`-6402373705728000`
`20`		`121645100408832000`

[-1,-1,1,-2,6,-24,120,-720,5040,-40320,362880, -3628800,39916800,-479001600,6227020800, -87178291200,1307674368000,-20922789888000, 355687428096000,-6402373705728000, 121645100408832000]

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Last modified June 1 15:30 EDT 2024. Contains 373025 sequences. (Running on oeis4.)