A027215 - OEIS

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A027215 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`20`
`4`		`78`
`5`		`282`
`6`		`1187`
`7`		`4428`
`8`		`19175`
`9`		`72820`
`10`		`319493`
`11`		`1227712`
`12`		`5424359`
`13`		`21018514`
`14`		`93252862`
`15`		`363563668`
`16`		`1617342486`
`17`		`6334904252`
`18`		`28232695584`
`19`		`110982722888`
`20`		`495257577162`

[1,2,6,20,78,282,1187,4428,19175,72820,319493, 1227712,5424359,21018514,93252862,363563668, 1617342486,6334904252,28232695584,110982722888, 495257577162]

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Last modified May 1 16:12 EDT 2024. Contains 372175 sequences. (Running on oeis4.)