A002793 - OEIS

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A002793 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`4`
`3`		`20`
`4`		`124`
`5`		`920`
`6`		`7940`
`7`		`78040`
`8`		`859580`
`9`		`10477880`
`10`		`139931620`
`11`		`2030707640`
`12`		`31805257340`
`13`		`534514790680`
`14`		`9591325648580`
`15`		`182974870484120`
`16`		`3697147584561340`
`17`		`78861451031150840`
`18`		`1770536585183202980`
`19`		`41729280102868841080`
`20`		`1030007496863617367420`
`21`		`26568602827124392999640`

[0,1,4,20,124,920,7940,78040,859580,10477880, 139931620,2030707640,31805257340,534514790680, 9591325648580,182974870484120,3697147584561340, 78861451031150840,1770536585183202980, 41729280102868841080,1030007496863617367420, 26568602827124392999640]

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Last modified May 5 22:20 EDT 2024. Contains 372290 sequences. (Running on oeis4.)