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A146410
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
1
10
1
11
1
12
1
13
7
14
7
15
21
16
21
17
53
18
53
19
267
20
267
21
1477
22
1477
23
11799
24
11799
[1,1,1,1,1,1,1,1,1,1,1,1,7,7,21,21,53,53,267,267, 1477,1477,11799,11799]