A000090 - OEIS

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

A000090 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`2`
`3`		`4`
`4`		`16`
`5`		`80`
`6`		`520`
`7`		`3640`
`8`		`29120`
`9`		`259840`
`10`		`2598400`
`11`		`28582400`
`12`		`343235200`
`13`		`4462057600`
`14`		`62468806400`
`15`		`936987251200`
`16`		`14991796019200`
`17`		`254860532326400`
`18`		`4587501779660800`
`19`		`87162533813555200`
`20`		`1743250676271104000`
`21`		`36608259566534656000`
`22`		`805381710463762432000`

[1,1,2,4,16,80,520,3640,29120,259840,2598400, 28582400,343235200,4462057600,62468806400, 936987251200,14991796019200,254860532326400, 4587501779660800,87162533813555200, 1743250676271104000,36608259566534656000, 805381710463762432000]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 07:38 EDT 2024. Contains 371782 sequences. (Running on oeis4.)