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A002844
as a simple table
n
a(n)
1
1
2
1
3
2
4
5
5
13
6
36
7
102
8
296
9
871
10
2599
11
7830
12
23799
13
72855
14
224455
15
695303
16
2164491
[1,1,2,5,13,36,102,296,871,2599,7830,23799,72855, 224455,695303,2164491]