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A370644
as a simple table
n
a(n)
0
0
1
0
2
0
3
0
4
0
5
1
6
4
7
13
8
13
9
26
10
56
11
126
12
243
13
471
14
812
15
1438
[0,0,0,0,0,1,4,13,13,26,56,126,243,471,812,1438]