A006780 - OEIS

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A006780 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`6`
`2`		`24`
`3`		`90`
`4`		`324`
`5`		`1166`
`6`		`4138`
`7`		`14730`
`8`		`51992`
`9`		`183898`
`10`		`646980`
`11`		`2279702`
`12`		`8002976`
`13`		`28127418`
`14`		`98585096`
`15`		`345848306`
`16`		`1210704274`
`17`		`4241348770`
`18`		`14833284544`
`19`		`51907058582`
`20`		`181392476966`
`21`		`634197818374`
`22`		`2214804822718`
`23`		`7737946227490`

[1,6,24,90,324,1166,4138,14730,51992,183898, 646980,2279702,8002976,28127418,98585096, 345848306,1210704274,4241348770,14833284544, 51907058582,181392476966,634197818374, 2214804822718,7737946227490]

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Last modified April 24 12:20 EDT 2024. Contains 371937 sequences. (Running on oeis4.)