A007727 - OEIS

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A007727 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`18`
`4`		`64`
`5`		`250`
`6`		`900`
`7`		`3430`
`8`		`12800`
`9`		`48600`
`10`		`184500`
`11`		`705430`
`12`		`2703168`
`13`		`10400598`
`14`		`40113164`
`15`		`155117250`
`16`		`601067520`
`17`		`2333606218`
`18`		`9075085776`
`19`		`35345263798`
`20`		`137846344000`
`21`		`538257870990`
`22`		`2104098258284`
`23`		`8233430727598`
`24`		`32247600966144`

[1,2,4,18,64,250,900,3430,12800,48600,184500, 705430,2703168,10400598,40113164,155117250, 601067520,2333606218,9075085776,35345263798, 137846344000,538257870990,2104098258284, 8233430727598,32247600966144]

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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)