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A128661
as a simple table
n
a(n)
1
3
2
7
3
14
4
15
5
21
6
32
7
34
8
47
9
67
10
69
11
174
12
369
13
568
14
3193
15
3882
16
5426
[3,7,14,15,21,32,34,47,67,69,174,369,568,3193, 3882,5426]