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A071613
as a simple table
n
a(n)
1
2
2
523
3
22193
4
1442173
5
5521819
6
354963229
7
881160173
8
881160173
9
441586802467
10
3085029222449
[2,523,22193,1442173,5521819,354963229,881160173, 881160173,441586802467,3085029222449]