A020123 - OEIS

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A020123 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`3`
`5`		`12`
`6`		`63`
`7`		`393`
`8`		`2863`
`9`		`23715`
`10`		`220205`
`11`		`2264966`
`12`		`25561752`
`13`		`314044379`
`14`		`4172303890`
`15`		`59604341273`
`16`		`911094930877`
`17`		`14837831731420`
`18`		`256482519928832`
`19`		`4689966078698629`
`20`		`90449345803473559`
`21`		`1834829586299035049`

[1,1,1,1,3,12,63,393,2863,23715,220205,2264966, 25561752,314044379,4172303890,59604341273, 911094930877,14837831731420,256482519928832, 4689966078698629,90449345803473559, 1834829586299035049]

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Last modified September 7 13:22 EDT 2024. Contains 375730 sequences. (Running on oeis4.)