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A147246
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
5
6
21
7
67
8
345
9
1649
10
10337
11
85161
12
930265
13
12022615
14
198707417
15
3901444367
[1,1,1,1,5,21,67,345,1649,10337,85161,930265, 12022615,198707417,3901444367]