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A301632
as a simple table
n
a(n)
1
0
2
1
3
3
4
15
5
45
6
117
7
159
8
3739
9
3777
10
9703
11
10623
12
21459
13
86595
[0,1,3,15,45,117,159,3739,3777,9703,10623,21459, 86595]