A220817 - OEIS

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A220817 as a simple table

`n`		`a(n)`
`1`		`4`
`2`		`10`
`3`		`40`
`4`		`215`
`5`		`1260`
`6`		`8010`
`7`		`53240`
`8`		`366680`
`9`		`2590420`
`10`		`18674660`
`11`		`136809240`
`12`		`1015603015`
`13`		`7622900360`
`14`		`57753364510`
`15`		`441081947840`
`16`		`3392237023425`
`17`		`26248421645200`
`18`		`204202630151860`
`19`		`1596256637347240`
`20`		`12531697773337965`
`21`		`98763817012822460`
`22`		`781102051887068160`

[4,10,40,215,1260,8010,53240,366680,2590420, 18674660,136809240,1015603015,7622900360, 57753364510,441081947840,3392237023425, 26248421645200,204202630151860,1596256637347240, 12531697773337965,98763817012822460, 781102051887068160]

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