A306881 - OEIS

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A306881 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`1`
`2`		`4`
`3`		`18`
`4`		`120`
`5`		`1100`
`6`		`13092`
`7`		`192360`
`8`		`3362128`
`9`		`68063760`
`10`		`1565077220`
`11`		`40275499264`
`12`		`1146522753288`
`13`		`35767031711424`
`14`		`1213309504953028`
`15`		`44464470056979840`
`16`		`1750597156059648544`
`17`		`73688248937813125376`
`18`		`3302340234016493521476`
`19`		`156980994639584475390976`
`20`		`7889413937606432287327000`

[0,1,4,18,120,1100,13092,192360,3362128,68063760, 1565077220,40275499264,1146522753288, 35767031711424,1213309504953028,44464470056979840, 1750597156059648544,73688248937813125376, 3302340234016493521476,156980994639584475390976, 7889413937606432287327000]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)