A189940 - OEIS

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A189940 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`3`
`3`		`9`
`4`		`28`
`5`		`90`
`6`		`306`
`7`		`1078`
`8`		`3984`
`9`		`15228`
`10`		`60580`
`11`		`248556`
`12`		`1055088`
`13`		`4606264`
`14`		`20712888`
`15`		`95550120`
`16`		`452450176`
`17`		`2193051408`
`18`		`10882018224`
`19`		`55166645008`
`20`		`285683655360`
`21`		`1508969248416`
`22`		`8127210649888`
`23`		`44582377997664`
`24`		`249000413522688`
`25`		`1414657929227200`
`26`		`8172653475494976`

[1,3,9,28,90,306,1078,3984,15228,60580,248556, 1055088,4606264,20712888,95550120,452450176, 2193051408,10882018224,55166645008,285683655360, 1508969248416,8127210649888,44582377997664, 249000413522688,1414657929227200,8172653475494976]

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Last modified April 19 11:14 EDT 2024. Contains 371791 sequences. (Running on oeis4.)