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A155698
as a simple table
n
a(n)
1
1
2
1
3
1
4
2
5
3
6
5
7
14
8
139
9
537963
10
1005095210669462420559310863604
[1,1,1,2,3,5,14,139,537963, 1005095210669462420559310863604]