A128721 - OEIS

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A128721 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`0`
`2`		`0`
`3`		`4`
`4`		`28`
`5`		`157`
`6`		`820`
`7`		`4155`
`8`		`20742`
`9`		`102725`
`10`		`506504`
`11`		`2491230`
`12`		`12236520`
`13`		`60063399`
`14`		`294748884`
`15`		`1446436680`
`16`		`7099442700`
`17`		`34855583275`
`18`		`171187439920`
`19`		`841084246980`
`20`		`4134129246180`
`21`		`20328683526575`
`22`		`100003531112300`
`23`		`492153054177155`

[0,0,0,4,28,157,820,4155,20742,102725,506504, 2491230,12236520,60063399,294748884,1446436680, 7099442700,34855583275,171187439920,841084246980, 4134129246180,20328683526575,100003531112300, 492153054177155]

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Last modified August 20 06:44 EDT 2024. Contains 375311 sequences. (Running on oeis4.)