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A309742
as a simple table
n
a(n)
1
0
2
1
3
6
4
11
5
23
6
297
7
474
8
1121
9
2531
10
3573
11
5437
12
5919
[0,1,6,11,23,297,474,1121,2531,3573,5437,5919]