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A075530
as a simple table
n
a(n)
1
1
2
2
3
3
4
6
5
13
6
22
7
39
8
62
9
117
10
180
11
367
12
594
13
1073
14
1888
15
3567
[1,2,3,6,13,22,39,62,117,180,367,594,1073,1888, 3567]