A054720 - OEIS

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A054720 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`5`
`2`		`20`
`3`		`120`
`4`		`600`
`5`		`3120`
`6`		`15480`
`7`		`78120`
`8`		`390000`
`9`		`1953000`
`10`		`9762480`
`11`		`48828120`
`12`		`244124400`
`13`		`1220703120`
`14`		`6103437480`
`15`		`30517574880`
`16`		`152587500000`
`17`		`762939453120`
`18`		`3814695297000`
`19`		`19073486328120`
`20`		`95367421874400`
`21`		`476837158124880`
`22`		`2384185742187480`
`23`		`11920928955078120`

[1,5,20,120,600,3120,15480,78120,390000,1953000, 9762480,48828120,244124400,1220703120,6103437480, 30517574880,152587500000,762939453120, 3814695297000,19073486328120,95367421874400, 476837158124880,2384185742187480, 11920928955078120]

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Last modified August 1 03:42 EDT 2024. Contains 374810 sequences. (Running on oeis4.)