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A147501
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
3
10
7
11
13
12
21
13
43
14
105
15
253
16
653
[1,1,1,1,1,1,1,1,3,7,13,21,43,105,253,653]