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A278687
as a simple table
n
a(n)
1
1
2
1
3
7
4
92
5
2102
6
66201
7
2651890
8
126928146
9
7060794663
10
447024321962
[1,1,7,92,2102,66201,2651890,126928146,7060794663, 447024321962]