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A094176
as a simple table
n
a(n)
0
0
1
0
2
0
3
1
4
2
5
5
6
15
7
43
8
127
9
383
10
1143
11
3423
12
10264
13
30785
[0,0,0,1,2,5,15,43,127,383,1143,3423,10264,30785]