A006740 - OEIS

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A006740 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`4`
`2`		`20`
`3`		`68`
`4`		`196`
`5`		`512`
`6`		`1256`
`7`		`2936`
`8`		`6628`
`9`		`14528`
`10`		`31140`
`11`		`65414`
`12`		`135276`
`13`		`275656`
`14`		`555216`
`15`		`1105726`
`16`		`2182380`
`17`		`4268906`
`18`		`8290740`
`19`		`15984420`
`20`		`30638312`
`21`		`58369924`
`22`		`110665328`
`23`		`208734268`
`24`		`392103508`
`25`		`733311754`
`26`		`1366650536`
`27`		`2537201920`

[0,4,20,68,196,512,1256,2936,6628,14528,31140, 65414,135276,275656,555216,1105726,2182380, 4268906,8290740,15984420,30638312,58369924, 110665328,208734268,392103508,733311754, 1366650536,2537201920]

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Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)