A222667 - OEIS

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A222667 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`0`
`3`		`2`
`4`		`9`
`5`		`24`
`6`		`80`
`7`		`288`
`8`		`1038`
`9`		`3608`
`10`		`12696`
`11`		`45024`
`12`		`160364`
`13`		`571200`
`14`		`2039424`
`15`		`7297632`
`16`		`26163672`
`17`		`93938304`
`18`		`337754400`
`19`		`1215965472`
`20`		`4382841504`
`21`		`15814326912`
`22`		`57117508992`
`23`		`206479723776`
`24`		`747042295968`
`25`		`2704860854400`
`26`		`9800596459776`

[0,0,2,9,24,80,288,1038,3608,12696,45024,160364, 571200,2039424,7297632,26163672,93938304, 337754400,1215965472,4382841504,15814326912, 57117508992,206479723776,747042295968, 2704860854400,9800596459776]

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Last modified April 24 19:59 EDT 2024. Contains 371963 sequences. (Running on oeis4.)