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A307821
as a simple table
n
a(n)
1
0
2
0
3
1
4
12
5
102
6
1045
7
10449
8
104365
9
1043641
10
10436775
11
104367354
[0,0,1,12,102,1045,10449,104365,1043641,10436775, 104367354]