A001869 - OEIS

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A001869 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`5`
`2`		`15`
`3`		`45`
`4`		`165`
`5`		`629`
`6`		`2635`
`7`		`11165`
`8`		`48915`
`9`		`217045`
`10`		`976887`
`11`		`4438925`
`12`		`20346485`
`13`		`93900245`
`14`		`435970995`
`15`		`2034505661`
`16`		`9536767665`
`17`		`44878791365`
`18`		`211927736135`
`19`		`1003867701485`
`20`		`4768372070757`
`21`		`22706531350485`
`22`		`108372083629275`
`23`		`518301258916445`

[1,5,15,45,165,629,2635,11165,48915,217045,976887, 4438925,20346485,93900245,435970995,2034505661, 9536767665,44878791365,211927736135,1003867701485, 4768372070757,22706531350485,108372083629275, 518301258916445]

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Last modified April 23 07:42 EDT 2024. Contains 371905 sequences. (Running on oeis4.)