A027377 - OEIS

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A027377 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`6`
`3`		`20`
`4`		`60`
`5`		`204`
`6`		`670`
`7`		`2340`
`8`		`8160`
`9`		`29120`
`10`		`104754`
`11`		`381300`
`12`		`1397740`
`13`		`5162220`
`14`		`19172790`
`15`		`71582716`
`16`		`268431360`
`17`		`1010580540`
`18`		`3817733920`
`19`		`14467258260`
`20`		`54975528948`
`21`		`209430785460`
`22`		`799644629550`
`23`		`3059510616420`

[1,4,6,20,60,204,670,2340,8160,29120,104754, 381300,1397740,5162220,19172790,71582716, 268431360,1010580540,3817733920,14467258260, 54975528948,209430785460,799644629550, 3059510616420]

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Last modified May 17 12:26 EDT 2024. Contains 372600 sequences. (Running on oeis4.)