A120018 - OEIS

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A120018 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`9`
`4`		`30`
`5`		`114`
`6`		`480`
`7`		`2157`
`8`		`10092`
`9`		`48525`
`10`		`238143`
`11`		`1187952`
`12`		`6006171`
`13`		`30710553`
`14`		`158535975`
`15`		`825143145`
`16`		`4325320191`
`17`		`22814398392`
`18`		`120999555588`
`19`		`644878190175`
`20`		`3451975941243`
`21`		`18550877091063`
`22`		`100047282676491`
`23`		`541314936448764`

[1,3,9,30,114,480,2157,10092,48525,238143,1187952, 6006171,30710553,158535975,825143145,4325320191, 22814398392,120999555588,644878190175, 3451975941243,18550877091063,100047282676491, 541314936448764]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)