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A366171
as a simple table
n
a(n)
1
3
2
7
3
19
4
27
5
31
6
39
7
151
8
199
9
451
10
2371
11
2511
12
7859
13
103819
[3,7,19,27,31,39,151,199,451,2371,2511,7859, 103819]