A100320 - OEIS

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A100320 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`12`
`3`		`40`
`4`		`140`
`5`		`504`
`6`		`1848`
`7`		`6864`
`8`		`25740`
`9`		`97240`
`10`		`369512`
`11`		`1410864`
`12`		`5408312`
`13`		`20801200`
`14`		`80233200`
`15`		`310235040`
`16`		`1202160780`
`17`		`4667212440`
`18`		`18150270600`
`19`		`70690527600`
`20`		`275693057640`
`21`		`1076515748880`
`22`		`4208197927440`
`23`		`16466861455200`
`24`		`64495207366200`
`25`		`252821212875504`
`26`		`991837065896208`

[1,4,12,40,140,504,1848,6864,25740,97240,369512, 1410864,5408312,20801200,80233200,310235040, 1202160780,4667212440,18150270600,70690527600, 275693057640,1076515748880,4208197927440, 16466861455200,64495207366200,252821212875504, 991837065896208]

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Last modified July 30 15:11 EDT 2024. Contains 374761 sequences. (Running on oeis4.)