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A240882
as a simple table
n
a(n)
1
6
2
7
3
9
4
11
5
15
6
21
7
23
8
27
9
33
10
35
11
47
12
77
13
83
14
143
15
167
16
227
17
437
[6,7,9,11,15,21,23,27,33,35,47,77,83,143,167,227, 437]