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A293437
as a simple table
n
a(n)
1
1
2
3
3
6
4
7
5
13
6
14
7
15
8
26
9
29
10
30
11
31
12
58
13
62
14
239
15
247
16
478
17
479
18
494
19
958
20
245757
21
491514
[1,3,6,7,13,14,15,26,29,30,31,58,62,239,247,478, 479,494,958,245757,491514]