A143920 - OEIS

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A143920 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`4`
`3`		`18`
`4`		`112`
`5`		`880`
`6`		`8256`
`7`		`90384`
`8`		`1131264`
`9`		`15927552`
`10`		`249164800`
`11`		`4287669760`
`12`		`80490393600`
`13`		`1636924403712`
`14`		`35850727342080`
`15`		`841260590499840`
`16`		`21056773882052608`
`17`		`559992309313503232`
`18`		`15768699458743959552`

[1,1,4,18,112,880,8256,90384,1131264,15927552, 249164800,4287669760,80490393600,1636924403712, 35850727342080,841260590499840,21056773882052608, 559992309313503232,15768699458743959552]

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Last modified May 10 19:29 EDT 2024. Contains 372388 sequences. (Running on oeis4.)