A221440 - OEIS

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A221440 as a simple table

`n`		`a(n)`
`1`		`3`
`2`		`9`
`3`		`31`
`4`		`105`
`5`		`355`
`6`		`1201`
`7`		`4063`
`8`		`13745`
`9`		`46499`
`10`		`157305`
`11`		`532159`
`12`		`1800281`
`13`		`6090307`
`14`		`20603361`
`15`		`69700671`
`16`		`235795681`
`17`		`797691075`
`18`		`2698569577`
`19`		`9129195487`
`20`		`30883847113`
`21`		`104479306403`
`22`		`353450961809`
`23`		`1195716038943`
`24`		`4045078385041`
`25`		`13684402155875`

[3,9,31,105,355,1201,4063,13745,46499,157305, 532159,1800281,6090307,20603361,69700671, 235795681,797691075,2698569577,9129195487, 30883847113,104479306403,353450961809, 1195716038943,4045078385041,13684402155875]

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Last modified May 2 19:04 EDT 2024. Contains 372203 sequences. (Running on oeis4.)