A023018 - OEIS

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A023018 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`20`
`2`		`230`
`3`		`1960`
`4`		`13685`
`5`		`82524`
`6`		`443870`
`7`		`2175800`
`8`		`9869990`
`9`		`41907380`
`10`		`168012824`
`11`		`640438680`
`12`		`2334121995`
`13`		`8171039800`
`14`		`27580783270`
`15`		`90058003200`
`16`		`285253928790`
`17`		`878572253720`
`18`		`2636748302650`
`19`		`7725084195240`
`20`		`22130265931900`
`21`		`62079251390180`

[1,20,230,1960,13685,82524,443870,2175800,9869990, 41907380,168012824,640438680,2334121995, 8171039800,27580783270,90058003200,285253928790, 878572253720,2636748302650,7725084195240, 22130265931900,62079251390180]

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Last modified May 10 13:29 EDT 2024. Contains 372387 sequences. (Running on oeis4.)