A215789 - OEIS

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

A215789 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`2`
`5`		`5`
`6`		`12`
`7`		`42`
`8`		`110`
`9`		`462`
`10`		`1274`
`11`		`6006`
`12`		`17136`
`13`		`87516`
`14`		`255816`
`15`		`1385670`
`16`		`4124406`
`17`		`23371634`
`18`		`70549050`
`19`		`414315330`
`20`		`1264752060`
`21`		`7646001090`
`22`		`23555382240`
`23`		`145862174640`
`24`		`452806924752`
`25`		`2861142656400`
`26`		`8939481277552`
`27`		`57468093927120`

[1,1,1,2,5,12,42,110,462,1274,6006,17136,87516, 255816,1385670,4124406,23371634,70549050, 414315330,1264752060,7646001090,23555382240, 145862174640,452806924752,2861142656400, 8939481277552,57468093927120]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 11:39 EDT 2024. Contains 371936 sequences. (Running on oeis4.)