A081875 - OEIS

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A081875 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`4`
`3`		`12`
`4`		`40`
`5`		`130`
`6`		`480`
`7`		`1722`
`8`		`6480`
`9`		`24336`
`10`		`92520`
`11`		`352726`
`12`		`1352640`
`13`		`5200312`
`14`		`20060040`
`15`		`77559060`
`16`		`300546720`
`17`		`1166803126`
`18`		`4537592928`
`19`		`17672631918`
`20`		`68923357200`
`21`		`269128940724`
`22`		`1052049834616`
`23`		`4116715363822`
`24`		`16123803207552`

[1,4,12,40,130,480,1722,6480,24336,92520,352726, 1352640,5200312,20060040,77559060,300546720, 1166803126,4537592928,17672631918,68923357200, 269128940724,1052049834616,4116715363822, 16123803207552]

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Last modified September 5 17:38 EDT 2024. Contains 375700 sequences. (Running on oeis4.)