A018996 - OEIS

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A018996 as a simple table

`n`		`a(n)`
`2`		`3`
`3`		`9`
`4`		`52`
`5`		`291`
`6`		`1445`
`7`		`6420`
`8`		`32959`
`9`		`187727`
`10`		`1102665`
`11`		`6930612`
`12`		`46522650`
`13`		`320194002`
`14`		`2204132941`
`15`		`15091491681`
`16`		`102924219886`

[3,9,52,291,1445,6420,32959,187727,1102665, 6930612,46522650,320194002,2204132941,15091491681, 102924219886]

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Last modified September 3 22:09 EDT 2024. Contains 375675 sequences. (Running on oeis4.)