A274520 - OEIS

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A274520 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`2`
`2`		`4`
`3`		`20`
`4`		`64`
`5`		`248`
`6`		`880`
`7`		`3248`
`8`		`11776`
`9`		`43040`
`10`		`156736`
`11`		`571712`
`12`		`2083840`
`13`		`7597952`
`14`		`27698944`
`15`		`100985600`
`16`		`368164864`
`17`		`1342243328`
`18`		`4893475840`
`19`		`17840411648`
`20`		`65041678336`
`21`		`237125826560`
`22`		`864501723136`
`23`		`3151758405632`
`24`		`11490527150080`
`25`		`41891604733952`
`26`		`152726372368384`

[0,2,4,20,64,248,880,3248,11776,43040,156736, 571712,2083840,7597952,27698944,100985600, 368164864,1342243328,4893475840,17840411648, 65041678336,237125826560,864501723136, 3151758405632,11490527150080,41891604733952, 152726372368384]

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Last modified April 23 02:53 EDT 2024. Contains 371906 sequences. (Running on oeis4.)