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A156314
as a simple table
n
a(n)
0
2
1
5
2
23
3
47
4
283
5
557
6
5147
7
2273
8
12899
9
103703
10
146417
11
3369869
12
5037233
13
71067323
14
6484133
[2,5,23,47,283,557,5147,2273,12899,103703,146417, 3369869,5037233,71067323,6484133]