A064821 - OEIS

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

A064821 as a simple table

`n`		`a(n)`
`1`		`0`
`2`		`1`
`3`		`1`
`4`		`4`
`5`		`2`
`6`		`8`
`7`		`12`
`8`		`30`
`9`		`70`
`10`		`664`
`11`		`1072`
`12`		`8768`
`13`		`11648`
`14`		`37108`
`15`		`95772`
`16`		`1059816`
`17`		`2047488`
`18`		`12111712`
`19`		`22802028`
`20`		`120779959`
`21`		`337801784`
`22`		`4361743860`
`23`		`11425028900`
`24`		`142573286216`
`25`		`429917269469`
`26`		`4138239848098`
`27`		`16171519847028`
`28`		`214845911686065`

[0,1,1,4,2,8,12,30,70,664,1072,8768,11648,37108, 95772,1059816,2047488,12111712,22802028,120779959, 337801784,4361743860,11425028900,142573286216, 429917269469,4138239848098,16171519847028, 214845911686065]

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 16 21:21 EDT 2024. Contains 375191 sequences. (Running on oeis4.)