A171680 - OEIS

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A171680 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`-1`
`3`		`16`
`4`		`353`
`5`		`6535`
`6`		`117764`
`7`		`2114521`
`8`		`37946999`
`9`		`680940352`
`10`		`12219002585`
`11`		`219261167071`
`12`		`3934482164084`
`13`		`70601418203761`
`14`		`1266891046596143`
`15`		`22733437423387120`
`16`		`407934982581860369`
`17`		`7320096249069704311`
`18`		`131353797500724143204`
`19`		`2357048258764099246537`

[1,-1,16,353,6535,117764,2114521,37946999, 680940352,12219002585,219261167071,3934482164084, 70601418203761,1266891046596143,22733437423387120, 407934982581860369,7320096249069704311, 131353797500724143204,2357048258764099246537]

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Last modified May 11 22:00 EDT 2024. Contains 372431 sequences. (Running on oeis4.)