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A147360
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
25
6
141
7
756
8
10461
9
137862
10
2668563
11
89609916
12
3827996725
13
213188142328
[1,1,1,1,25,141,756,10461,137862,2668563,89609916, 3827996725,213188142328]