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A121180
as a simple table
n
a(n)
1
0
2
0
3
0
4
1
5
1
6
5
7
6
8
26
9
32
10
133
11
176
12
708
13
952
14
3861
15
5302
16
21604
17
29960
[0,0,0,1,1,5,6,26,32,133,176,708,952,3861,5302, 21604,29960]