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A147287
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
25
10
41
11
113
12
265
13
1045
14
2597
15
10607
16
34895
17
213407
18
913033
19
6860785
20
33581603
[1,1,1,1,1,1,1,1,25,41,113,265,1045,2597,10607, 34895,213407,913033,6860785,33581603]