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A278968
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
3
6
5
7
1
8
27
9
3
10
565
11
1
12
7085
13
25
14
3
15
11
16
1266205
17
9099507
18
17602325
19
128207979
20
119
21
1
22
13
[1,1,1,1,3,5,1,27,3,565,1,7085,25,3,11,1266205, 9099507,17602325,128207979,119,1,13]