A018989 - OEIS

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A018989 as a simple table

`n`		`a(n)`
`2`		`3`
`3`		`7`
`4`		`28`
`5`		`168`
`6`		`1005`
`7`		`5596`
`8`		`33768`
`9`		`220112`
`10`		`1441963`
`11`		`9548019`
`12`		`64276931`
`13`		`438234213`
`14`		`3015411286`
`15`		`20922996951`
`16`		`146320241045`

[3,7,28,168,1005,5596,33768,220112,1441963, 9548019,64276931,438234213,3015411286,20922996951, 146320241045]

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)