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A132441
as a simple table
n
a(n)
1
1
2
1
3
2
4
5
5
12
6
31
7
88
8
263
9
814
10
2604
11
8575
12
28936
13
99726
14
350151
15
1249865
[1,1,2,5,12,31,88,263,814,2604,8575,28936,99726, 350151,1249865]