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A143884
as a simple table
n
a(n)
0
1
1
2
2
3
3
7
4
16
5
41
6
121
7
434
8
1581
9
7325
10
35854
11
219307
12
1397579
13
11370922
[1,2,3,7,16,41,121,434,1581,7325,35854,219307, 1397579,11370922]