A222890 - OEIS

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A222890 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`2`
`3`		`3`
`4`		`7`
`5`		`20`
`6`		`67`
`7`		`255`
`8`		`1080`
`9`		`5016`
`10`		`25249`
`11`		`136289`
`12`		`780658`
`13`		`4696002`
`14`		`29374011`
`15`		`189373083`
`16`		`1248978556`
`17`		`8376922028`
`18`		`56874440053`
`19`		`389553674037`
`20`		`2685020105574`
`21`		`18589701176694`
`22`		`129115803986575`
`23`		`898809701733551`
`24`		`6266899328414512`

[1,2,3,7,20,67,255,1080,5016,25249,136289,780658, 4696002,29374011,189373083,1248978556,8376922028, 56874440053,389553674037,2685020105574, 18589701176694,129115803986575,898809701733551, 6266899328414512]

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Last modified November 29 00:31 EST 2023. Contains 367422 sequences. (Running on oeis4.)