A013991 - OEIS

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A013991 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`4`
`3`		`16`
`4`		`72`
`5`		`335`
`6`		`1562`
`7`		`7273`
`8`		`33850`
`9`		`157534`
`10`		`733148`
`11`		`3412005`
`12`		`15879172`
`13`		`73900265`
`14`		`343925312`
`15`		`1600598044`
`16`		`7449042040`
`17`		`34667184251`
`18`		`161338016046`
`19`		`750852888177`
`20`		`3494403076902`
`21`		`16262643529850`
`22`		`75684907767980`
`23`		`352230881365025`
`24`		`1639251436594792`
`25`		`7628931517771089`

[1,1,4,16,72,335,1562,7273,33850,157534,733148, 3412005,15879172,73900265,343925312,1600598044, 7449042040,34667184251,161338016046,750852888177, 3494403076902,16262643529850,75684907767980, 352230881365025,1639251436594792,7628931517771089]

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Last modified April 24 07:01 EDT 2024. Contains 371920 sequences. (Running on oeis4.)