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A147018
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
5
6
9
7
21
8
35
9
177
10
589
11
4235
12
15969
13
164553
14
879607
15
12456629
16
97189937
17
1947709409
18
20669429409
[1,1,1,1,5,9,21,35,177,589,4235,15969,164553, 879607,12456629,97189937,1947709409,20669429409]