A123620 - OEIS

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

A123620 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`16`
`3`		`60`
`4`		`228`
`5`		`864`
`6`		`3276`
`7`		`12420`
`8`		`47088`
`9`		`178524`
`10`		`676836`
`11`		`2566080`
`12`		`9728748`
`13`		`36884484`
`14`		`139839696`
`15`		`530172540`
`16`		`2010036708`
`17`		`7620627744`
`18`		`28891993356`
`19`		`109537863300`
`20`		`415289569968`
`21`		`1574482299804`
`22`		`5969315609316`
`23`		`22631393727360`
`24`		`85802128010028`
`25`		`325300565212164`

[1,4,16,60,228,864,3276,12420,47088,178524,676836, 2566080,9728748,36884484,139839696,530172540, 2010036708,7620627744,28891993356,109537863300, 415289569968,1574482299804,5969315609316, 22631393727360,85802128010028,325300565212164]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)