A126947 - OEIS

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

A126947 as a simple table

`n`		`a(n)`
`0`		`0`
`1`		`2`
`2`		`4`
`3`		`12`
`4`		`42`
`5`		`132`
`6`		`414`
`7`		`1320`
`8`		`4198`
`9`		`13322`
`10`		`42308`
`11`		`134392`
`12`		`426832`
`13`		`1355612`
`14`		`4305518`
`15`		`13674594`
`16`		`43431194`
`17`		`137939776`
`18`		`438104256`
`19`		`1391442706`
`20`		`4419296770`
`21`		`14035924512`
`22`		`44578852058`
`23`		`141584833642`
`24`		`449681053086`
`25`		`1428211232054`
`26`		`4536075755738`
`27`		`14406820782444`

[0,2,4,12,42,132,414,1320,4198,13322,42308,134392, 426832,1355612,4305518,13674594,43431194, 137939776,438104256,1391442706,4419296770, 14035924512,44578852058,141584833642,449681053086, 1428211232054,4536075755738,14406820782444]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 20 00:26 EDT 2024. Contains 371798 sequences. (Running on oeis4.)