A006421 - OEIS

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A006421 as a simple table

`n`		`a(n)`
`2`		`1`
`3`		`30`
`4`		`449`
`5`		`4795`
`6`		`41850`
`7`		`319320`
`8`		`2213665`
`9`		`14283280`
`10`		`87169790`
`11`		`508887860`
`12`		`2865204762`
`13`		`15654301865`
`14`		`83388235348`
`15`		`434685964540`
`16`		`2223970137825`
`17`		`11194499812388`
`18`		`55546566721430`
`19`		`272142754971892`
`20`		`1318317357277470`
`21`		`6321681903231990`
`22`		`30037740651227756`
`23`		`141545610360126400`

[1,30,449,4795,41850,319320,2213665,14283280, 87169790,508887860,2865204762,15654301865, 83388235348,434685964540,2223970137825, 11194499812388,55546566721430,272142754971892, 1318317357277470,6321681903231990, 30037740651227756,141545610360126400]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)