A020040 - OEIS

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A020040 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`0`
`2`		`0`
`3`		`1`
`4`		`2`
`5`		`7`
`6`		`37`
`7`		`229`
`8`		`1647`
`9`		`13507`
`10`		`124269`
`11`		`1267543`
`12`		`14196477`
`13`		`173197024`
`14`		`2286200718`
`15`		`32464050199`
`16`		`493453563029`
`17`		`7993947721071`
`18`		`137495900802424`
`19`		`2502425394604114`
`20`		`48046567576398986`
`21`		`970540665043259525`

[1,0,0,1,2,7,37,229,1647,13507,124269,1267543, 14196477,173197024,2286200718,32464050199, 493453563029,7993947721071,137495900802424, 2502425394604114,48046567576398986, 970540665043259525]

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Last modified April 27 10:37 EDT 2024. Contains 372017 sequences. (Running on oeis4.)