A009561 - OEIS

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A009561 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`4`
`4`		`13`
`5`		`28`
`6`		`61`
`7`		`119`
`8`		`226`
`9`		`423`
`10`		`790`
`11`		`1472`
`12`		`2764`
`13`		`5224`
`14`		`9956`
`15`		`19112`
`16`		`36923`
`17`		`71703`
`18`		`139835`
`19`		`273625`
`20`		`536860`
`21`		`1055588`
`22`		`2079066`
`23`		`4100573`
`24`		`8096789`
`25`		`16002500`
`26`		`31652194`
`27`		`62648225`
`28`		`124068499`
`29`		`245826760`

[1,4,13,28,61,119,226,423,790,1472,2764,5224,9956, 19112,36923,71703,139835,273625,536860,1055588, 2079066,4100573,8096789,16002500,31652194, 62648225,124068499,245826760]

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Last modified August 12 10:37 EDT 2024. Contains 375092 sequences. (Running on oeis4.)