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A036746
as a simple table
n
a(n)
1
1
2
2
3
3
4
8
5
18
6
28
7
38
8
88
9
188
10
288
11
388
12
888
13
1888
14
2888
15
3888
[1,2,3,8,18,28,38,88,188,288,388,888,1888,2888, 3888]