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A028752
as a simple table
n
a(n)
1
2
2
5
3
6
4
7
5
8
6
11
7
14
8
15
9
17
10
18
11
19
12
20
13
21
14
23
15
24
16
26
17
28
18
29
19
31
20
32
21
33
22
34
23
35
24
37
25
38
[2,5,6,7,8,11,14,15,17,18,19,20,21,23,24,26,28,29, 31,32,33,34,35,37,38]