A221587 - OEIS

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A221587 as a simple table

`n`		`a(n)`
`1`		`2`
`2`		`8`
`3`		`40`
`4`		`180`
`5`		`772`
`6`		`3264`
`7`		`13634`
`8`		`56456`
`9`		`232150`
`10`		`949520`
`11`		`3867132`
`12`		`15696660`
`13`		`63539998`
`14`		`256648344`
`15`		`1034811554`
`16`		`4166389484`
`17`		`16755205300`
`18`		`67316907560`
`19`		`270245535066`
`20`		`1084211943720`
`21`		`4347515085838`
`22`		`17425292086536`
`23`		`69817530875564`

[2,8,40,180,772,3264,13634,56456,232150,949520, 3867132,15696660,63539998,256648344,1034811554, 4166389484,16755205300,67316907560,270245535066, 1084211943720,4347515085838,17425292086536, 69817530875564]

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Last modified April 24 05:47 EDT 2024. Contains 371918 sequences. (Running on oeis4.)