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A154917
as a simple table
n
a(n)
0
0
1
1
2
1
3
3
4
5
5
11
6
21
7
43
8
85
9
171
10
341
11
683
12
1365
13
2731
14
5461
[0,1,1,3,5,11,21,43,85,171,341,683,1365,2731,5461]
