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A077893
as a simple table
n
a(n)
0
1
1
1
2
1
3
1
4
3
5
3
6
5
7
5
8
11
9
11
10
21
11
21
12
43
13
43
14
85
15
85
16
171
17
171
18
341
19
341
20
683
21
683
22
1365
23
1365
[1,1,1,1,3,3,5,5,11,11,21,21,43,43,85,85,171,171, 341,341,683,683,1365,1365]