login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A026644 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 20
5 42
6 84
7 170
8 340
9 682
10 1364
11 2730
12 5460
13 10922
14 21844
15 43690
16 87380
17 174762
18 349524
19 699050
20 1398100
21 2796202
22 5592404
23 11184810
24 22369620
25 44739242
26 89478484
27 178956970
28 357913940
29 715827882
30 1431655764
31 2863311530
32 5726623060

[1,2,4,10,20,42,84,170,340,682,1364,2730,5460,
 10922,21844,43690,87380,174762,349524,699050,
 1398100,2796202,5592404,11184810,22369620,
 44739242,89478484,178956970,357913940,715827882,
 1431655764,2863311530,5726623060]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 2 16:47 EDT 2020. Contains 335404 sequences. (Running on oeis4.)