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A173443
as a simple table
n
a(n)
1
1
2
7
3
3
4
79
5
41
6
33
7
239
8
2629
9
9
10
2981
11
21649
12
813
13
3000811
14
51139
15
13947
16
5165039
[1,7,3,79,41,33,239,2629,9,2981,21649,813,3000811, 51139,13947,5165039]