A020038 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A020038 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`9`
`5`		`41`
`6`		`231`
`7`		`1528`
`8`		`11610`
`9`		`99850`
`10`		`958562`
`11`		`10160756`
`12`		`117864768`
`13`		`1485096081`
`14`		`20197306708`
`15`		`294880677942`
`16`		`4600138575888`
`17`		`76362300359740`
`18`		`1343976486331426`
`19`		`24997962645764522`
`20`		`489960067856984638`

[1,1,1,2,9,41,231,1528,11610,99850,958562, 10160756,117864768,1485096081,20197306708, 294880677942,4600138575888,76362300359740, 1343976486331426,24997962645764522, 489960067856984638]

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 2 19:04 EDT 2024. Contains 372203 sequences. (Running on oeis4.)