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A007835
as a simple table
n
a(n)
1
1
2
1
3
3
4
8
5
21
6
52
7
124
8
284
9
629
10
1352
11
2829
12
5777
13
11544
[1,1,3,8,21,52,124,284,629,1352,2829,5777,11544]