A000560 - OEIS

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A000560 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`2`
`4`		`5`
`5`		`12`
`6`		`33`
`7`		`87`
`8`		`252`
`9`		`703`
`10`		`2105`
`11`		`6099`
`12`		`18689`
`13`		`55639`
`14`		`173423`
`15`		`526937`
`16`		`1664094`
`17`		`5137233`
`18`		`16393315`
`19`		`51255709`
`20`		`164951529`
`21`		`521138861`
`22`		`1688959630`
`23`		`5382512216`
`24`		`17547919924`
`25`		`56335234064`
`26`		`184596351277`
`27`		`596362337295`
`28`		`1962723402375`

[1,2,5,12,33,87,252,703,2105,6099,18689,55639, 173423,526937,1664094,5137233,16393315,51255709, 164951529,521138861,1688959630,5382512216, 17547919924,56335234064,184596351277,596362337295, 1962723402375]

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)