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A299445
as a simple table
n
a(n)
1
1
2
4
3
1
4
21
5
231
6
211
7
6326
8
174794
9
665961
10
84553473
11
4512663317
[1,4,1,21,231,211,6326,174794,665961,84553473, 4512663317]