A209200 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A209200 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`112`
`4`		`680`
`5`		`4384`
`6`		`29536`
`7`		`205440`
`8`		`1462368`
`9`		`10587520`
`10`		`77633920`
`11`		`574845440`
`12`		`4289409280`
`13`		`32206976000`
`14`		`243074083840`
`15`		`1842511532032`
`16`		`14018197145088`
`17`		`106996519311360`
`18`		`818973463721984`
`19`		`6284217844736000`
`20`		`48327723087278080`
`21`		`372397083591557120`

[1,4,20,112,680,4384,29536,205440,1462368, 10587520,77633920,574845440,4289409280, 32206976000,243074083840,1842511532032, 14018197145088,106996519311360,818973463721984, 6284217844736000,48327723087278080, 372397083591557120]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 23:15 EDT 2024. Contains 371798 sequences. (Running on oeis4.)