A013140 - OEIS

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A013140 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`4`
`4`		`-16`
`5`		`-88`
`6`		`64`
`7`		`2496`
`8`		`4096`
`9`		`-106624`
`10`		`-480896`
`11`		`6875136`
`12`		`54717440`
`13`		`-673392640`
`14`		`-7775895552`
`15`		`99550288896`
`16`		`1454255472640`
`17`		`-21279326830592`
`18`		`-360442602684416`
`19`		`6159283224084480`
`20`		`116460747215831040`

[1,2,4,4,-16,-88,64,2496,4096,-106624,-480896, 6875136,54717440,-673392640,-7775895552, 99550288896,1454255472640,-21279326830592, -360442602684416,6159283224084480, 116460747215831040]

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Last modified September 17 14:42 EDT 2024. Contains 375987 sequences. (Running on oeis4.)