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A090071
as a simple table
n
a(n)
1
2
2
5
3
10003
4
30001
5
40000
6
40004
7
100000
8
100001
9
2000000
10
2000002
[2,5,10003,30001,40000,40004,100000,100001, 2000000,2000002]