A000391 - OEIS

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

A000391 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`6`
`3`		`21`
`4`		`71`
`5`		`216`
`6`		`672`
`7`		`1982`
`8`		`5817`
`9`		`16582`
`10`		`46633`
`11`		`128704`
`12`		`350665`
`13`		`941715`
`14`		`2499640`
`15`		`6557378`
`16`		`17024095`
`17`		`43756166`
`18`		`111433472`
`19`		`281303882`
`20`		`704320180`
`21`		`1749727370`
`22`		`4314842893`
`23`		`10565857064`
`24`		`25700414815`
`25`		`62115621317`
`26`		`149214574760`
`27`		`356354881511`
`28`		`846292135184`

[1,6,21,71,216,672,1982,5817,16582,46633,128704, 350665,941715,2499640,6557378,17024095,43756166, 111433472,281303882,704320180,1749727370, 4314842893,10565857064,25700414815,62115621317, 149214574760,356354881511,846292135184]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)