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A178880
as a simple table
n
a(n)
1
1
2
1
3
2
4
2
5
3
6
5
7
7
8
7
9
10
10
17
11
17
12
48
13
56
14
31
15
58
16
57
17
518
18
677
19
674
20
5160
[1,1,2,2,3,5,7,7,10,17,17,48,56,31,58,57,518,677, 674,5160]