A019309 - OEIS

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A019309 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`12`
`3`		`48`
`4`		`180`
`5`		`720`
`6`		`2832`
`7`		`11328`
`8`		`45132`
`9`		`180528`
`10`		`721392`
`11`		`2885568`
`12`		`11539440`
`13`		`46157760`
`14`		`184619712`
`15`		`738478848`
`16`		`2953870260`
`17`		`11815481040`
`18`		`47261743632`
`19`		`189046974528`
`20`		`756187176720`
`21`		`3024748706880`
`22`		`12098991941952`

[1,4,12,48,180,720,2832,11328,45132,180528,721392, 2885568,11539440,46157760,184619712,738478848, 2953870260,11815481040,47261743632,189046974528, 756187176720,3024748706880,12098991941952]

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Last modified July 3 01:51 EDT 2024. Contains 373963 sequences. (Running on oeis4.)