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A007671
as a simple table
n
a(n)
1
1
2
3
3
5
4
11
5
19
6
29
7
157
8
163
9
283
10
379
11
997
12
10141
13
14699
14
77291
15
85237
16
106693
17
203789
18
3704053
[1,3,5,11,19,29,157,163,283,379,997,10141,14699, 77291,85237,106693,203789,3704053]