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A127502
as a simple table
n
a(n)
1
1
2
3
3
19
4
201
5
3001
6
55291
7
1115003
8
21837649
9
373215601
10
8282131891
[1,3,19,201,3001,55291,1115003,21837649,373215601, 8282131891]