A047097 - OEIS

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

A047097 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`16`
`3`		`60`
`4`		`228`
`5`		`860`
`6`		`3267`
`7`		`12426`
`8`		`47471`
`9`		`181812`
`10`		`698512`
`11`		`2690086`
`12`		`10384712`
`13`		`40170182`
`14`		`155681112`
`15`		`604362074`
`16`		`2349783665`
`17`		`9148780570`
`18`		`35665860725`
`19`		`139202880860`
`20`		`543887439194`
`21`		`2127148912456`
`22`		`8326877989146`
`23`		`32623644335536`

[1,4,16,60,228,860,3267,12426,47471,181812,698512, 2690086,10384712,40170182,155681112,604362074, 2349783665,9148780570,35665860725,139202880860, 543887439194,2127148912456,8326877989146, 32623644335536]

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 8 02:36 EDT 2024. Contains 375749 sequences. (Running on oeis4.)