A033139 - OEIS

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A033139 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`9`
`4`		`28`
`5`		`84`
`6`		`252`
`7`		`757`
`8`		`2271`
`9`		`6813`
`10`		`20440`
`11`		`61320`
`12`		`183960`
`13`		`551881`
`14`		`1655643`
`15`		`4966929`
`16`		`14900788`
`17`		`44702364`
`18`		`134107092`
`19`		`402321277`
`20`		`1206963831`
`21`		`3620891493`
`22`		`10862674480`
`23`		`32588023440`
`24`		`97764070320`
`25`		`293292210961`
`26`		`879876632883`

[1,3,9,28,84,252,757,2271,6813,20440,61320,183960, 551881,1655643,4966929,14900788,44702364, 134107092,402321277,1206963831,3620891493, 10862674480,32588023440,97764070320,293292210961, 879876632883]

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Last modified May 19 12:15 EDT 2024. Contains 372692 sequences. (Running on oeis4.)