A120915 - OEIS

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

A120915 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`116`
`4`		`720`
`5`		`4656`
`6`		`30996`
`7`		`210896`
`8`		`1459536`
`9`		`10239796`
`10`		`72651184`
`11`		`520328112`
`12`		`3756512912`
`13`		`27307671040`
`14`		`199705789248`
`15`		`1468209751856`
`16`		`10844681408064`
`17`		`80437588353600`
`18`		`598867568439828`
`19`		`4473784063109904`
`20`		`33524058847464912`

[1,4,20,116,720,4656,30996,210896,1459536, 10239796,72651184,520328112,3756512912, 27307671040,199705789248,1468209751856, 10844681408064,80437588353600,598867568439828, 4473784063109904,33524058847464912]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 26 05:58 EDT 2024. Contains 371990 sequences. (Running on oeis4.)