A083691 - OEIS

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

A083691 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`6`
`3`		`20`
`4`		`76`
`5`		`296`
`6`		`1240`
`7`		`5200`
`8`		`22960`
`9`		`100512`
`10`		`458592`
`11`		`2064704`
`12`		`9633472`
`13`		`44237440`
`14`		`209780096`
`15`		`977536256`
`16`		`4693031680`
`17`		`22117091840`
`18`		`107211650560`
`19`		`509817656320`
`20`		`2490609167360`
`21`		`11930278307840`
`22`		`58656838113280`
`23`		`282679983493120`

[1,2,6,20,76,296,1240,5200,22960,100512,458592, 2064704,9633472,44237440,209780096,977536256, 4693031680,22117091840,107211650560,509817656320, 2490609167360,11930278307840,58656838113280, 282679983493120]

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 17 19:30 EDT 2024. Contains 375227 sequences. (Running on oeis4.)