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A299596
as a simple table
n
a(n)
1
0
2
1
3
9
4
130
5
21367
6
7242300
7
9743385598
8
43313516068423
9
635719287829223338
[0,1,9,130,21367,7242300,9743385598, 43313516068423,635719287829223338]