A005505 - OEIS

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

A005505 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`2`
`2`		`4`
`3`		`10`
`4`		`29`
`5`		`86`
`6`		`266`
`7`		`844`
`8`		`2742`
`9`		`9032`
`10`		`30202`
`11`		`101988`
`12`		`347914`
`13`		`1195500`
`14`		`4138310`
`15`		`14405848`
`16`		`50428392`
`17`		`177321636`
`18`		`626250990`
`19`		`2219876580`
`20`		`7896651847`
`21`		`28176271634`
`22`		`100830069380`
`23`		`361757157484`
`24`		`1301092926454`
`25`		`4689840961196`
`26`		`16940093338162`
`27`		`61305930699382`

[1,2,4,10,29,86,266,844,2742,9032,30202,101988, 347914,1195500,4138310,14405848,50428392, 177321636,626250990,2219876580,7896651847, 28176271634,100830069380,361757157484, 1301092926454,4689840961196,16940093338162, 61305930699382]

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 06:24 EDT 2024. Contains 371769 sequences. (Running on oeis4.)