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A187549
as a simple table
n
a(n)
2
1
1
0
0
0
-1
2
-2
1
-3
9
-4
1
-5
6
-6
8
-7
3
-8
4
-9
0
[1,0,0,2,1,9,1,6,8,3,4,0]
