A027289 - OEIS

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A027289 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`3`
`4`		`18`
`5`		`55`
`6`		`264`
`7`		`847`
`8`		`3744`
`9`		`12465`
`10`		`52868`
`11`		`180895`
`12`		`749220`
`13`		`2617173`
`14`		`10680656`
`15`		`37915317`
`16`		`153240864`
`17`		`551019963`
`18`		`2212417314`
`19`		`8038946075`
`20`		`32129224712`
`21`		`117758845827`
`22`		`469105048654`
`23`		`1731917060158`
`24`		`6882935960496`
`25`		`25569740611270`
`26`		`101442831429264`
`27`		`378875492015643`

[1,3,18,55,264,847,3744,12465,52868,180895,749220, 2617173,10680656,37915317,153240864,551019963, 2212417314,8038946075,32129224712,117758845827, 469105048654,1731917060158,6882935960496, 25569740611270,101442831429264,378875492015643]

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Last modified April 23 08:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)