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A048897
as a simple table
n
a(n)
1
1
2
5
3
1
4
45
5
15
6
1
7
585
8
255
9
30
10
1
11
9945
12
5175
13
825
14
50
15
1
16
208845
17
123795
18
24150
[1,5,1,45,15,1,585,255,30,1,9945,5175,825,50,1, 208845,123795,24150]