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A172451
as a simple table
n
a(n)
1
1
2
2
3
4
4
6
5
22
6
333
7
355
8
103993
9
104348
10
1042060
11
1146408
12
4272943
13
5419351
14
80143857
[1,2,4,6,22,333,355,103993,104348,1042060,1146408, 4272943,5419351,80143857]