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A280520
as a simple table
n
a(n)
1
1
2
0
3
1
4
6
5
1
6
72
7
6
8
2320
9
72
10
245765
11
2320
12
151182379
13
245765
[1,0,1,6,1,72,6,2320,72,245765,2320,151182379, 245765]