A263965 - OEIS

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A263965 as a simple table

`n`		`a(n)`
`1`		`4`
`2`		`20`
`3`		`108`
`4`		`465`
`5`		`2265`
`6`		`10920`
`7`		`52752`
`8`		`253176`
`9`		`1221305`
`10`		`5885873`
`11`		`28368956`
`12`		`136712788`
`13`		`658952404`
`14`		`3175970497`
`15`		`15307435585`
`16`		`73778034832`
`17`		`355593913600`
`18`		`1713880597360`
`19`		`8260513454657`
`20`		`39813787812289`
`21`		`191893397639092`
`22`		`924882430123988`

[4,20,108,465,2265,10920,52752,253176,1221305, 5885873,28368956,136712788,658952404,3175970497, 15307435585,73778034832,355593913600, 1713880597360,8260513454657,39813787812289, 191893397639092,924882430123988]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)