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A267347
as a simple table
n
a(n)
1
1
2
1
3
2
4
2
5
4
6
9
7
649
8
25661
9
413155
10
3534075
11
21319105
12
108404456
13
526041190
14
2738297888
[1,1,2,2,4,9,649,25661,413155,3534075,21319105, 108404456,526041190,2738297888]