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A217152
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
0
10
0
11
0
12
0
13
1
14
9
15
46
16
191
17
781
18
3161
19
15002
[0,0,0,0,0,0,0,0,0,0,0,0,1,9,46,191,781,3161, 15002]