A221680 - OEIS

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A221680 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`2`
`3`		`5`
`4`		`32`
`5`		`133`
`6`		`636`
`7`		`2856`
`8`		`13169`
`9`		`60120`
`10`		`275632`
`11`		`1261451`
`12`		`5777107`
`13`		`26449970`
`14`		`121113272`
`15`		`554546205`
`16`		`2539172736`
`17`		`11626346343`
`18`		`53234805475`
`19`		`243751618738`
`20`		`1116090939600`
`21`		`5110360772166`
`22`		`23399338403512`
`23`		`107140971422686`

[0,2,5,32,133,636,2856,13169,60120,275632,1261451, 5777107,26449970,121113272,554546205,2539172736, 11626346343,53234805475,243751618738, 1116090939600,5110360772166,23399338403512, 107140971422686]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)