A221677 - OEIS

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A221677 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`5`
`4`		`14`
`5`		`40`
`6`		`113`
`7`		`320`
`8`		`906`
`9`		`2565`
`10`		`7262`
`11`		`20560`
`12`		`58209`
`13`		`164800`
`14`		`466578`
`15`		`1320965`
`16`		`3739886`
`17`		`10588280`
`18`		`29977297`
`19`		`84871040`
`20`		`240284954`
`21`		`680289285`
`22`		`1926019518`
`23`		`5452902560`
`24`		`15438133441`
`25`		`43708091520`
`26`		`123745352482`
`27`		`350345021445`

[0,2,5,14,40,113,320,906,2565,7262,20560,58209, 164800,466578,1320965,3739886,10588280,29977297, 84871040,240284954,680289285,1926019518, 5452902560,15438133441,43708091520,123745352482, 350345021445]

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Last modified May 9 05:44 EDT 2024. Contains 372344 sequences. (Running on oeis4.)