A020055 - OEIS

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A020055 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`1`
`4`		`5`
`5`		`24`
`6`		`136`
`7`		`879`
`8`		`6554`
`9`		`55412`
`10`		`523897`
`11`		`5477110`
`12`		`62737806`
`13`		`781370863`
`14`		`10512989797`
`15`		`151960488890`
`16`		`2348480282846`
`17`		`38643175563195`
`18`		`674499064375771`
`19`		`12447573642571060`
`20`		`242161887228200639`
`21`		`4953311329667740358`

[1,0,0,1,5,24,136,879,6554,55412,523897,5477110, 62737806,781370863,10512989797,151960488890, 2348480282846,38643175563195,674499064375771, 12447573642571060,242161887228200639, 4953311329667740358]

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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)