A087761 - OEIS

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A087761 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`4`
`3`		`21`
`4`		`140`
`5`		`1130`
`6`		`10674`
`7`		`115206`
`8`		`1396016`
`9`		`18739080`
`10`		`275712840`
`11`		`4408612560`
`12`		`76070179272`
`13`		`1408041937848`
`14`		`27816773482848`
`15`		`583970117197320`
`16`		`12978149959718400`
`17`		`304310928180279360`
`18`		`7506092106055537344`

[1,1,4,21,140,1130,10674,115206,1396016,18739080, 275712840,4408612560,76070179272,1408041937848, 27816773482848,583970117197320,12978149959718400, 304310928180279360,7506092106055537344]

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)