A000669 - OEIS

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A000669 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`5`
`5`		`12`
`6`		`33`
`7`		`90`
`8`		`261`
`9`		`766`
`10`		`2312`
`11`		`7068`
`12`		`21965`
`13`		`68954`
`14`		`218751`
`15`		`699534`
`16`		`2253676`
`17`		`7305788`
`18`		`23816743`
`19`		`78023602`
`20`		`256738751`
`21`		`848152864`
`22`		`2811996972`
`23`		`9353366564`
`24`		`31204088381`
`25`		`104384620070`
`26`		`350064856815`
`27`		`1176693361956`
`28`		`3963752002320`

[1,1,2,5,12,33,90,261,766,2312,7068,21965,68954, 218751,699534,2253676,7305788,23816743,78023602, 256738751,848152864,2811996972,9353366564, 31204088381,104384620070,350064856815, 1176693361956,3963752002320]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)