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A201343
as a simple table
n
a(n)
1
0
2
2007
3
120750
4
6442039
5
365946958
6
21233514530
7
1207482454151
8
66042015070636
9
3456814178223675
[0,2007,120750,6442039,365946958,21233514530, 1207482454151,66042015070636,3456814178223675]