A103820 - OEIS

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

A103820 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`16`
`3`		`61`
`4`		`232`
`5`		`880`
`6`		`3337`
`7`		`12652`
`8`		`47968`
`9`		`181861`
`10`		`689488`
`11`		`2614048`
`12`		`9910609`
`13`		`37573972`
`14`		`142453744`
`15`		`540083149`
`16`		`2047610680`
`17`		`7763081488`
`18`		`29432076505`
`19`		`111585473980`
`20`		`423052651456`
`21`		`1603914376309`
`22`		`6080901083296`
`23`		`23054446378816`

[1,4,16,61,232,880,3337,12652,47968,181861,689488, 2614048,9910609,37573972,142453744,540083149, 2047610680,7763081488,29432076505,111585473980, 423052651456,1603914376309,6080901083296, 23054446378816]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)