A215691 - OEIS

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A215691 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`4`
`3`		`18`
`4`		`124`
`5`		`950`
`6`		`8688`
`7`		`89600`
`8`		`1038392`
`9`		`13309272`
`10`		`186471480`
`11`		`2837173152`
`12`		`46466835072`
`13`		`815532508440`
`14`		`15246845864040`
`15`		`302533865599800`
`16`		`6344720827608384`
`17`		`140208886623418752`
`18`		`3254819745378435264`
`19`		`79172189409906466560`
`20`		`2013138139856523598080`

[1,1,4,18,124,950,8688,89600,1038392,13309272, 186471480,2837173152,46466835072,815532508440, 15246845864040,302533865599800,6344720827608384, 140208886623418752,3254819745378435264, 79172189409906466560,2013138139856523598080]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)