A220881 - OEIS

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A220881 as a simple table

`n`		`a(n)`
`4`		`1`
`5`		`1`
`6`		`4`
`7`		`12`
`8`		`43`
`9`		`143`
`10`		`504`
`11`		`1768`
`12`		`6310`
`13`		`22610`
`14`		`81752`
`15`		`297160`
`16`		`1086601`
`17`		`3991995`
`18`		`14732720`
`19`		`54587280`
`20`		`202997670`
`21`		`757398510`
`22`		`2834510744`
`23`		`10637507400`
`24`		`40023636310`
`25`		`150946230006`
`26`		`570534578704`
`27`		`2160865067312`
`28`		`8199711378716`
`29`		`31170212479588`
`30`		`118686578956272`

[1,1,4,12,43,143,504,1768,6310,22610,81752,297160, 1086601,3991995,14732720,54587280,202997670, 757398510,2834510744,10637507400,40023636310, 150946230006,570534578704,2160865067312, 8199711378716,31170212479588,118686578956272]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)