A218667 - OEIS

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A218667 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`1`
`4`		`4`
`5`		`13`
`6`		`46`
`7`		`181`
`8`		`778`
`9`		`3585`
`10`		`17566`
`11`		`91171`
`12`		`499324`
`13`		`2873839`
`14`		`17317743`
`15`		`108933098`
`16`		`713481122`
`17`		`4855161425`
`18`		`34257461754`
`19`		`250177938679`
`20`		`1887886966690`
`21`		`14699340919293`
`22`		`117933068390123`
`23`		`973776266303732`
`24`		`8265721830953558`
`25`		`72052688932613079`
`26`		`644393453082317301`

[1,0,1,1,4,13,46,181,778,3585,17566,91171,499324, 2873839,17317743,108933098,713481122,4855161425, 34257461754,250177938679,1887886966690, 14699340919293,117933068390123,973776266303732, 8265721830953558,72052688932613079, 644393453082317301]

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)