A117998 - OEIS

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A117998 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`6`
`2`		`20`
`3`		`120`
`4`		`272`
`5`		`1632`
`6`		`5440`
`7`		`32640`
`8`		`65792`
`9`		`394752`
`10`		`1315840`
`11`		`7895040`
`12`		`17895424`
`13`		`107372544`
`14`		`357908480`
`15`		`2147450880`
`16`		`4295032832`
`17`		`25770196992`
`18`		`85900656640`
`19`		`515403939840`
`20`		`1168248930304`
`21`		`7009493581824`
`22`		`23364978606080`

[1,6,20,120,272,1632,5440,32640,65792,394752, 1315840,7895040,17895424,107372544,357908480, 2147450880,4295032832,25770196992,85900656640, 515403939840,1168248930304,7009493581824, 23364978606080]

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Last modified April 24 19:06 EDT 2024. Contains 371962 sequences. (Running on oeis4.)