A149953 - OEIS

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

A149953 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`5`
`3`		`15`
`4`		`51`
`5`		`183`
`6`		`690`
`7`		`2680`
`8`		`10664`
`9`		`43361`
`10`		`179166`
`11`		`750618`
`12`		`3182815`
`13`		`13627850`
`14`		`58858838`
`15`		`256136007`
`16`		`1121888880`
`17`		`4942820194`
`18`		`21890082385`
`19`		`97392793659`
`20`		`435140490144`
`21`		`1951512891396`
`22`		`8782251791612`
`23`		`39646601500866`
`24`		`179495259553219`
`25`		`814795429411189`
`26`		`3707690621124339`
`27`		`16909746064544733`

[1,2,5,15,51,183,690,2680,10664,43361,179166, 750618,3182815,13627850,58858838,256136007, 1121888880,4942820194,21890082385,97392793659, 435140490144,1951512891396,8782251791612, 39646601500866,179495259553219,814795429411189, 3707690621124339,16909746064544733]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)