A220874 - OEIS

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A220874 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`20`
`4`		`64`
`5`		`194`
`6`		`562`
`7`		`1570`
`8`		`4258`
`9`		`11266`
`10`		`29186`
`11`		`74242`
`12`		`185858`
`13`		`458754`
`14`		`1118210`
`15`		`2695170`
`16`		`6430722`
`17`		`15204354`
`18`		`35651586`
`19`		`82968578`
`20`		`191758338`
`21`		`440401922`
`22`		`1005584386`
`23`		`2283798530`
`24`		`5161091074`
`25`		`11609833474`
`26`		`26004684802`
`27`		`58015612930`
`28`		`128949682178`

[1,2,6,20,64,194,562,1570,4258,11266,29186,74242, 185858,458754,1118210,2695170,6430722,15204354, 35651586,82968578,191758338,440401922,1005584386, 2283798530,5161091074,11609833474,26004684802, 58015612930,128949682178]

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Last modified May 8 09:43 EDT 2024. Contains 372332 sequences. (Running on oeis4.)