A012821 - OEIS

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A012821 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`3`
`4`		`9`
`5`		`45`
`6`		`225`
`7`		`1071`
`8`		`6993`
`9`		`56697`
`10`		`467745`
`11`		`3279419`
`12`		`29529753`
`13`		`376156261`
`14`		`4297350785`
`15`		`35274762407`
`16`		`378759492257`
`17`		`8003761282417`
`18`		`122599030798017`
`19`		`853554115621363`
`20`		`8002975063348265`
`21`		`450081179390735645`

[1,1,1,3,9,45,225,1071,6993,56697,467745,3279419, 29529753,376156261,4297350785,35274762407, 378759492257,8003761282417,122599030798017, 853554115621363,8002975063348265, 450081179390735645]

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Last modified April 24 19:24 EDT 2024. Contains 371962 sequences. (Running on oeis4.)