A005551 - OEIS

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A005551 as a simple table

`n`		`a(n)`
`4`		`1`
`5`		`20`
`6`		`130`
`7`		`576`
`8`		`2218`
`9`		`8170`
`10`		`29830`
`11`		`109192`
`12`		`402258`
`13`		`1492746`
`14`		`5578742`
`15`		`20986424`
`16`		`79420122`
`17`		`302175648`
`18`		`1155298598`
`19`		`4436375790`
`20`		`17103294308`
`21`		`66174208076`
`22`		`256870951048`
`23`		`1000080994758`
`24`		`3904276709604`
`25`		`15280413966512`

[1,20,130,576,2218,8170,29830,109192,402258, 1492746,5578742,20986424,79420122,302175648, 1155298598,4436375790,17103294308,66174208076, 256870951048,1000080994758,3904276709604, 15280413966512]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)