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A105269
as a simple table
n
a(n)
1
5
2
2
3
3
4
13
5
23
6
37
7
83
8
233
9
283
10
383
11
887
12
2383
13
2887
[5,2,3,13,23,37,83,233,283,383,887,2383,2887]