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A002976
as a simple table
n
a(n)
4
0
5
1
6
0
7
2
8
0
9
5
10
9
11
21
12
42
13
76
14
174
15
396
16
888
17
2023
18
4345
19
9921
20
22566
[0,1,0,2,0,5,9,21,42,76,174,396,888,2023,4345, 9921,22566]