A227404 - OEIS

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A227404 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`1`
`3`		`4`
`4`		`22`
`5`		`140`
`6`		`1020`
`7`		`8400`
`8`		`77280`
`9`		`786240`
`10`		`8769600`
`11`		`106444800`
`12`		`1397088000`
`13`		`19718899200`
`14`		`297859161600`
`15`		`4794806016000`
`16`		`81947593728000`
`17`		`1482030950400000`
`18`		`28277150533632000`
`19`		`567677135241216000`
`20`		`11961768206868480000`
`21`		`263969867887165440000`

[0,0,1,4,22,140,1020,8400,77280,786240,8769600, 106444800,1397088000,19718899200,297859161600, 4794806016000,81947593728000,1482030950400000, 28277150533632000,567677135241216000, 11961768206868480000,263969867887165440000]

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Last modified June 3 13:22 EDT 2023. Contains 363110 sequences. (Running on oeis4.)