A111961 - OEIS

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A111961 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`18`
`4`		`56`
`5`		`176`
`6`		`558`
`7`		`1778`
`8`		`5686`
`9`		`18230`
`10`		`58558`
`11`		`188366`
`12`		`606588`
`13`		`1955044`
`14`		`6305418`
`15`		`20347342`
`16`		`65689088`
`17`		`212146400`
`18`		`685342218`
`19`		`2214556478`
`20`		`7157409064`
`21`		`23136645472`
`22`		`74801223162`
`23`		`241863933094`
`24`		`782131232390`
`25`		`2529458676326`

[1,2,6,18,56,176,558,1778,5686,18230,58558,188366, 606588,1955044,6305418,20347342,65689088, 212146400,685342218,2214556478,7157409064, 23136645472,74801223162,241863933094,782131232390, 2529458676326]

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Last modified April 23 05:37 EDT 2024. Contains 371906 sequences. (Running on oeis4.)