A020028 - OEIS

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A020028 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`0`
`4`		`1`
`5`		`4`
`6`		`20`
`7`		`121`
`8`		`862`
`9`		`7000`
`10`		`63876`
`11`		`646743`
`12`		`7195013`
`13`		`87239530`
`14`		`1145018832`
`15`		`16173391002`
`16`		`244622538903`
`17`		`3944538439806`
`18`		`67550220781672`
`19`		`1224347751667801`
`20`		`23415650750646696`
`21`		`471239971356764754`

[1,0,0,0,1,4,20,121,862,7000,63876,646743,7195013, 87239530,1145018832,16173391002,244622538903, 3944538439806,67550220781672,1224347751667801, 23415650750646696,471239971356764754]

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Last modified May 11 02:35 EDT 2024. Contains 372388 sequences. (Running on oeis4.)