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A143307
as a simple table
n
a(n)
1
2
0
2
-1
3
-2
9
-3
4
-4
3
-5
3
-6
1
-7
0
-8
4
-9
0
-10
0
-11
5
-12
2
-13
6
-14
0
-15
7
-16
3
-17
1
-18
7
-19
5
-20
4
-21
7
-22
8
-23
5
[2,2,3,9,4,3,3,1,0,4,0,0,5,2,6,0,7,3,1,7,5,4,7,8, 5]