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A174511
as a simple table
n
a(n)
1
1
2
2
3
4
4
9
5
16
6
29
7
55
8
137
9
241
10
453
11
894
12
2065
13
3845
[1,2,4,9,16,29,55,137,241,453,894,2065,3845]