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A229028
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
9
9
10
10
13
11
16
12
23
13
29
14
31
15
34
16
37
17
41
18
44
19
52
20
53
[1,2,3,4,5,6,7,9,10,13,16,23,29,31,34,37,41,44,52, 53]