A020039 - OEIS

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A020039 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`1`
`3`		`1`
`4`		`5`
`5`		`20`
`6`		`109`
`7`		`695`
`8`		`5142`
`9`		`43193`
`10`		`406016`
`11`		`4222569`
`12`		`48137291`
`13`		`596902408`
`14`		`7998492273`
`15`		`115178288736`
`16`		`1773745646540`
`17`		`29089428603255`
`18`		`506156057696641`
`19`		`9313271461618196`
`20`		`180677466355392996`
`21`		`3685820313650017111`

[1,0,1,1,5,20,109,695,5142,43193,406016,4222569, 48137291,596902408,7998492273,115178288736, 1773745646540,29089428603255,506156057696641, 9313271461618196,180677466355392996, 3685820313650017111]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)