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A088273
as a simple table
n
a(n)
1
1
2
2
3
5
4
6
5
11
6
17
7
18
8
39
9
56
10
101
11
105
12
107
13
123
14
413
15
426
16
2607
[1,2,5,6,11,17,18,39,56,101,105,107,123,413,426, 2607]