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A359706
as a simple table
n
a(n)
1
0
2
1
3
0
4
1
5
1
6
4
7
7
8
31
9
95
10
420
11
1682
12
7544
13
33288
14
152022
15
696096
16
3231001
[0,1,0,1,1,4,7,31,95,420,1682,7544,33288,152022, 696096,3231001]