A261531 - OEIS

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

A261531 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`1`
`2`		`1`
`3`		`2`
`4`		`2`
`5`		`4`
`6`		`15`
`7`		`25`
`8`		`69`
`9`		`254`
`10`		`1799`
`11`		`4039`
`12`		`16828`
`13`		`61751`
`14`		`349831`
`15`		`3485031`
`16`		`10391139`
`17`		`49433136`
`18`		`240065255`
`19`		`1282012987`
`20`		`9167583734`
`21`		`131550812011`
`22`		`459677216341`
`23`		`2707382738559`
`24`		`14318807603110`
`25`		`94084166753927`
`26`		`601900541251447`
`27`		`5894253303715375`

[1,1,1,2,2,4,15,25,69,254,1799,4039,16828,61751, 349831,3485031,10391139,49433136,240065255, 1282012987,9167583734,131550812011,459677216341, 2707382738559,14318807603110,94084166753927, 601900541251447,5894253303715375]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)