A228980 - OEIS

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A228980 as a simple table

`n`		`a(n)`
`1`		`4`
`2`		`16`
`3`		`64`
`4`		`252`
`5`		`992`
`6`		`3900`
`7`		`15328`
`8`		`60228`
`9`		`236624`
`10`		`929580`
`11`		`3651712`
`12`		`14344836`
`13`		`56349296`
`14`		`221349132`
`15`		`869490976`
`16`		`3415475172`
`17`		`13416415184`
`18`		`52701313836`
`19`		`207017071552`
`20`		`813187592388`
`21`		`3194296661552`
`22`		`12547572276300`
`23`		`49288333901920`

[4,16,64,252,992,3900,15328,60228,236624,929580, 3651712,14344836,56349296,221349132,869490976, 3415475172,13416415184,52701313836,207017071552, 813187592388,3194296661552,12547572276300, 49288333901920]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)