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A344719
as a simple table
n
a(n)
1
1
2
2
3
5
4
8
5
11
6
17
7
21
8
28
9
35
10
42
11
51
12
60
13
69
14
80
15
91
[1,2,5,8,11,17,21,28,35,42,51,60,69,80,91]