A122681 - OEIS

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

A122681 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`1`
`3`		`4`
`4`		`19`
`5`		`54`
`6`		`180`
`7`		`508`
`8`		`1533`
`9`		`4332`
`10`		`13041`
`11`		`37492`
`12`		`111367`
`13`		`326636`
`14`		`968802`
`15`		`2858460`
`16`		`8483290`
`17`		`25113618`
`18`		`74512947`
`19`		`220885446`
`20`		`655274837`
`21`		`1943117294`
`22`		`5763235194`
`23`		`17089323366`
`24`		`50673594159`
`25`		`150232437482`
`26`		`445359235627`
`27`		`1320070201468`

[0,1,4,19,54,180,508,1533,4332,13041,37492,111367, 326636,968802,2858460,8483290,25113618,74512947, 220885446,655274837,1943117294,5763235194, 17089323366,50673594159,150232437482,445359235627, 1320070201468]

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 7 14:53 EDT 2024. Contains 372310 sequences. (Running on oeis4.)