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A084327
as a simple table
n
a(n)
0
0
1
1
2
9
3
72
4
567
5
4455
6
34992
7
274833
8
2158569
9
16953624
10
133155495
11
1045816839
[0,1,9,72,567,4455,34992,274833,2158569,16953624, 133155495,1045816839]