A020023 - OEIS

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A020023 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`1`
`4`		`2`
`5`		`8`
`6`		`43`
`7`		`267`
`8`		`1927`
`9`		`15845`
`10`		`146123`
`11`		`1493701`
`12`		`16762640`
`13`		`204876709`
`14`		`2708925368`
`15`		`38526938568`
`16`		`586465620430`
`17`		`9513775620310`
`18`		`163848357905336`
`19`		`2985681188497227`
`20`		`57391427290002261`
`21`		`1160582196308934615`

[1,0,0,1,2,8,43,267,1927,15845,146123,1493701, 16762640,204876709,2708925368,38526938568, 586465620430,9513775620310,163848357905336, 2985681188497227,57391427290002261, 1160582196308934615]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)