A033540 - OEIS

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A033540 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`21`
`5`		`88`
`6`		`445`
`7`		`2676`
`8`		`18739`
`9`		`149920`
`10`		`1349289`
`11`		`13492900`
`12`		`148421911`
`13`		`1781062944`
`14`		`23153818285`
`15`		`324153456004`
`16`		`4862301840075`
`17`		`77796829441216`
`18`		`1322546100500689`
`19`		`23805829809012420`
`20`		`452310766371235999`
`21`		`9046215327424720000`
`22`		`189970521875919120021`

[1,2,6,21,88,445,2676,18739,149920,1349289, 13492900,148421911,1781062944,23153818285, 324153456004,4862301840075,77796829441216, 1322546100500689,23805829809012420, 452310766371235999,9046215327424720000, 189970521875919120021]

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Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)