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A157982
as a simple table
n
a(n)
0
1
1
1
2
2
3
-1
4
0
5
6
6
1
7
0
8
-6
9
4
10
-19
11
0
12
120
13
-120
14
30
15
27
[1,1,2,-1,0,6,1,0,-6,4,-19,0,120,-120,30,27]