A001681 - OEIS

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A001681 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`5`
`4`		`15`
`5`		`51`
`6`		`196`
`7`		`827`
`8`		`3795`
`9`		`18755`
`10`		`99146`
`11`		`556711`
`12`		`3305017`
`13`		`20655285`
`14`		`135399720`
`15`		`927973061`
`16`		`6631556521`
`17`		`49294051497`
`18`		`380306658250`
`19`		`3039453750685`
`20`		`25120541332271`
`21`		`214363100120051`
`22`		`1885987611214092`
`23`		`17085579637664715`
`24`		`159185637725413675`

[1,1,2,5,15,51,196,827,3795,18755,99146,556711, 3305017,20655285,135399720,927973061,6631556521, 49294051497,380306658250,3039453750685, 25120541332271,214363100120051,1885987611214092, 17085579637664715,159185637725413675]

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Last modified August 30 21:20 EDT 2024. Contains 375548 sequences. (Running on oeis4.)