A001721 - OEIS

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A001721 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`11`
`2`		`107`
`3`		`1066`
`4`		`11274`
`5`		`127860`
`6`		`1557660`
`7`		`20355120`
`8`		`284574960`
`9`		`4243508640`
`10`		`67285058400`
`11`		`1131047366400`
`12`		`20099588140800`
`13`		`376612896038400`
`14`		`7422410595801600`
`15`		`153516757766400000`
`16`		`3325222830101760000`
`17`		`75283691519393280000`
`18`		`1778358268603445760000`

[1,11,107,1066,11274,127860,1557660,20355120, 284574960,4243508640,67285058400,1131047366400, 20099588140800,376612896038400,7422410595801600, 153516757766400000,3325222830101760000, 75283691519393280000,1778358268603445760000]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)