A020047 - OEIS

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A020047 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`2`
`4`		`8`
`5`		`39`
`6`		`218`
`7`		`1440`
`8`		`10922`
`9`		`93754`
`10`		`898484`
`11`		`9508956`
`12`		`110145408`
`13`		`1385996396`
`14`		`18826451052`
`15`		`274552411175`
`16`		`4278441740820`
`17`		`70950825535270`
`18`		`1247552015661833`
`19`		`23183674957715736`
`20`		`454013634588599833`

[1,0,0,2,8,39,218,1440,10922,93754,898484,9508956, 110145408,1385996396,18826451052,274552411175, 4278441740820,70950825535270,1247552015661833, 23183674957715736,454013634588599833]

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Last modified June 1 06:28 EDT 2024. Contains 373013 sequences. (Running on oeis4.)