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A169602
as a simple table
n
a(n)
1
0
2
1
3
2
4
4
5
5
6
17
7
18
8
23
9
57
10
58
11
340
12
837
13
4280
14
5352
15
13675
16
17515
17
25856
[0,1,2,4,5,17,18,23,57,58,340,837,4280,5352,13675, 17515,25856]