A007987 - OEIS

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A007987 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`8`
`3`		`40`
`4`		`312`
`5`		`2240`
`6`		`17280`
`7`		`134568`
`8`		`1071000`
`9`		`8627872`
`10`		`70302888`
`11`		`577920200`
`12`		`4786740112`
`13`		`39899052960`
`14`		`334391846048`
`15`		`2815803070920`
`16`		`23809393390680`
`17`		`202061204197632`
`18`		`1720404406215720`
`19`		`14690717541313128`
`20`		`125775000062934552`

[1,0,8,40,312,2240,17280,134568,1071000,8627872, 70302888,577920200,4786740112,39899052960, 334391846048,2815803070920,23809393390680, 202061204197632,1720404406215720, 14690717541313128,125775000062934552]

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Last modified April 19 05:19 EDT 2024. Contains 371782 sequences. (Running on oeis4.)