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A147254
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
5
6
5
7
21
8
29
9
145
10
485
11
3243
12
11105
13
102013
14
454621
15
6519613
16
40834561
17
722449417
[1,1,1,1,5,5,21,29,145,485,3243,11105,102013, 454621,6519613,40834561,722449417]