A020026 - OEIS

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A020026 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`3`
`4`		`10`
`5`		`45`
`6`		`251`
`7`		`1666`
`8`		`12701`
`9`		`109544`
`10`		`1054364`
`11`		`11202617`
`12`		`130230419`
`13`		`1644159040`
`14`		`22401666926`
`15`		`327624378798`
`16`		`5119130918712`
`17`		`85105551523595`
`18`		`1499985345603354`
`19`		`27937227061862467`
`20`		`548268081089050918`

[1,1,1,3,10,45,251,1666,12701,109544,1054364, 11202617,130230419,1644159040,22401666926, 327624378798,5119130918712,85105551523595, 1499985345603354,27937227061862467, 548268081089050918]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)