A268619 - OEIS

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A268619 as a simple table

`n`		`a(n)`
`1`		`2`
`2`		`1`
`3`		`2`
`4`		`4`
`5`		`10`
`6`		`25`
`7`		`70`
`8`		`200`
`9`		`600`
`10`		`1845`
`11`		`5830`
`12`		`18772`
`13`		`61542`
`14`		`204659`
`15`		`689410`
`16`		`2347920`
`17`		`8074762`
`18`		`28009524`
`19`		`97909318`
`20`		`344615860`
`21`		`1220539390`
`22`		`4347310451`
`23`		`15564141262`
`24`		`55985418344`
`25`		`202256970300`
`26`		`733607281875`
`27`		`2670698800548`
`28`		`9755982857964`
`29`		`35751803209918`
`30`		`131405090455065`
`31`		`484316704740126`
`32`		`1789672012052256`

[2,1,2,4,10,25,70,200,600,1845,5830,18772,61542, 204659,689410,2347920,8074762,28009524,97909318, 344615860,1220539390,4347310451,15564141262, 55985418344,202256970300,733607281875, 2670698800548,9755982857964,35751803209918, 131405090455065,484316704740126,1789672012052256]

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Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)