A003409 - OEIS

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A003409 as a simple table

`n`		`a(n)`
`1`		`3`
`2`		`9`
`3`		`30`
`4`		`105`
`5`		`378`
`6`		`1386`
`7`		`5148`
`8`		`19305`
`9`		`72930`
`10`		`277134`
`11`		`1058148`
`12`		`4056234`
`13`		`15600900`
`14`		`60174900`
`15`		`232676280`
`16`		`901620585`
`17`		`3500409330`
`18`		`13612702950`
`19`		`53017895700`
`20`		`206769793230`
`21`		`807386811660`
`22`		`3156148445580`
`23`		`12350146091400`
`24`		`48371405524650`
`25`		`189615909656628`
`26`		`743877799422156`

[3,9,30,105,378,1386,5148,19305,72930,277134, 1058148,4056234,15600900,60174900,232676280, 901620585,3500409330,13612702950,53017895700, 206769793230,807386811660,3156148445580, 12350146091400,48371405524650,189615909656628, 743877799422156]

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Last modified August 17 15:16 EDT 2024. Contains 375227 sequences. (Running on oeis4.)