A046721 - OEIS

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A046721 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`2`
`4`		`6`
`5`		`16`
`6`		`48`
`7`		`140`
`8`		`428`
`9`		`1308`
`10`		`4072`
`11`		`12796`
`12`		`40432`
`13`		`129432`
`14`		`413900`
`15`		`1342580`
`16`		`4335288`
`17`		`14201804`
`18`		`46226896`
`19`		`152594276`
`20`		`500016036`
`21`		`1660630740`
`22`		`5472190206`
`23`		`18264517264`
`24`		`60475691308`
`25`		`202684618564`
`26`		`673892675030`
`27`		`2266436498400`
`28`		`7562707682032`
`29`		`25510762766704`
`30`		`85394319699916`

[1,2,6,16,48,140,428,1308,4072,12796,40432,129432, 413900,1342580,4335288,14201804,46226896, 152594276,500016036,1660630740,5472190206, 18264517264,60475691308,202684618564,673892675030, 2266436498400,7562707682032,25510762766704, 85394319699916]

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Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)