A003018 - OEIS

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A003018 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`4`
`5`		`9`
`6`		`20`
`7`		`47`
`8`		`111`
`9`		`270`
`10`		`664`
`11`		`1659`
`12`		`4184`
`13`		`10662`
`14`		`27367`
`15`		`70747`
`16`		`183925`
`17`		`480656`
`18`		`1261630`
`19`		`3324772`
`20`		`8792592`
`21`		`23327249`
`22`		`62067785`
`23`		`165586565`

[1,1,2,4,9,20,47,111,270,664,1659,4184,10662, 27367,70747,183925,480656,1261630,3324772,8792592, 23327249,62067785,165586565]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)