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A082753
as a simple table
n
a(n)
1
0
2
1
3
5
4
17
5
49
6
129
7
321
8
769
9
1793
10
4097
11
9217
12
20481
13
45057
14
98305
15
212993
[0,1,5,17,49,129,321,769,1793,4097,9217,20481, 45057,98305,212993]