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A283502
as a simple table
n
a(n)
1
1
2
2
3
2
4
4
5
3
6
7
7
6
8
13
9
13
10
23
11
25
12
47
13
51
14
87
15
110
16
176
17
214
18
342
19
424
20
676
21
841
22
1253
23
1660
[1,2,2,4,3,7,6,13,13,23,25,47,51,87,110,176,214, 342,424,676,841,1253,1660]