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A216563
as a simple table
n
a(n)
1
4
2
13
3
31
4
61
5
313
6
613
7
5851
8
7741
9
13963
10
193201
11
344293
12
387433
[4,13,31,61,313,613,5851,7741,13963,193201,344293, 387433]