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A216403
as a simple table
n
a(n)
1
1
2
1
3
2
4
4
5
9
6
20
7
48
8
115
9
286
10
719
11
1842
12
4763
13
12452
14
32711
15
86239
[1,1,2,4,9,20,48,115,286,719,1842,4763,12452, 32711,86239]