A001863 - OEIS

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A001863 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`1`
`3`		`4`
`4`		`26`
`5`		`236`
`6`		`2760`
`7`		`39572`
`8`		`672592`
`9`		`13227804`
`10`		`295579520`
`11`		`7398318500`
`12`		`205075286784`
`13`		`6236796259916`
`14`		`206489747516416`
`15`		`7393749269685300`
`16`		`284714599444490240`
`17`		`11733037015160276348`
`18`		`515240326393584058368`
`19`		`24019843795708471562564`
`20`		`1184776250223810469888000`

[0,1,4,26,236,2760,39572,672592,13227804, 295579520,7398318500,205075286784,6236796259916, 206489747516416,7393749269685300, 284714599444490240,11733037015160276348, 515240326393584058368,24019843795708471562564, 1184776250223810469888000]

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Last modified August 22 09:53 EDT 2024. Contains 375369 sequences. (Running on oeis4.)