A121988 - OEIS

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A121988 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`2`
`3`		`6`
`4`		`21`
`5`		`80`
`6`		`322`
`7`		`1348`
`8`		`5814`
`9`		`25674`
`10`		`115566`
`11`		`528528`
`12`		`2449746`
`13`		`11485068`
`14`		`54377288`
`15`		`259663576`
`16`		`1249249981`
`17`		`6049846848`
`18`		`29469261934`
`19`		`144293491564`
`20`		`709806846980`
`21`		`3506278661820`
`22`		`17385618278700`
`23`		`86500622296800`
`24`		`431718990188850`
`25`		`2160826237261692`

[0,1,2,6,21,80,322,1348,5814,25674,115566,528528, 2449746,11485068,54377288,259663576,1249249981, 6049846848,29469261934,144293491564,709806846980, 3506278661820,17385618278700,86500622296800, 431718990188850,2160826237261692]

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)