A027090 - OEIS

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A027090 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`3`
`4`		`9`
`5`		`28`
`6`		`84`
`7`		`246`
`8`		`714`
`9`		`2059`
`10`		`5917`
`11`		`16971`
`12`		`48633`
`13`		`139333`
`14`		`399267`
`15`		`1144669`
`16`		`3283839`
`17`		`9427981`
`18`		`27090715`
`19`		`77911897`
`20`		`224272499`
`21`		`646157234`
`22`		`1863317958`
`23`		`5377939756`
`24`		`15535195892`
`25`		`44913790501`
`26`		`129955421387`
`27`		`376313609029`

[1,3,9,28,84,246,714,2059,5917,16971,48633,139333, 399267,1144669,3283839,9427981,27090715,77911897, 224272499,646157234,1863317958,5377939756, 15535195892,44913790501,129955421387,376313609029]

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Last modified September 6 06:12 EDT 2024. Contains 375703 sequences. (Running on oeis4.)