A001720 - OEIS

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

A001720 as a simple table

`n`		`a(n)`
`4`		`1`
`5`		`5`
`6`		`30`
`7`		`210`
`8`		`1680`
`9`		`15120`
`10`		`151200`
`11`		`1663200`
`12`		`19958400`
`13`		`259459200`
`14`		`3632428800`
`15`		`54486432000`
`16`		`871782912000`
`17`		`14820309504000`
`18`		`266765571072000`
`19`		`5068545850368000`
`20`		`101370917007360000`
`21`		`2128789257154560000`
`22`		`46833363657400320000`
`23`		`1077167364120207360000`

[1,5,30,210,1680,15120,151200,1663200,19958400, 259459200,3632428800,54486432000,871782912000, 14820309504000,266765571072000,5068545850368000, 101370917007360000,2128789257154560000, 46833363657400320000,1077167364120207360000]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 13:11 EDT 2024. Contains 371913 sequences. (Running on oeis4.)