A026861 - OEIS

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

A026861 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`5`
`3`		`22`
`4`		`95`
`5`		`411`
`6`		`1790`
`7`		`7855`
`8`		`34725`
`9`		`154573`
`10`		`692450`
`11`		`3120206`
`12`		`14135555`
`13`		`64356345`
`14`		`294341325`
`15`		`1351889910`
`16`		`6233399525`
`17`		`28845511125`
`18`		`133933280000`
`19`		`623811120960`
`20`		`2913924782375`
`21`		`13648296620445`
`22`		`64087737455725`
`23`		`301644762913977`

[1,5,22,95,411,1790,7855,34725,154573,692450, 3120206,14135555,64356345,294341325,1351889910, 6233399525,28845511125,133933280000,623811120960, 2913924782375,13648296620445,64087737455725, 301644762913977]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)