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A242187
as a simple table
n
a(n)
-1
4
-2
7
-3
4
-4
9
-5
4
-6
4
-7
3
-8
6
-9
0
-10
1
-11
9
-12
6
-13
3
-14
3
-15
5
-16
1
-17
8
-18
3
-19
7
[4,7,4,9,4,4,3,6,0,1,9,6,3,3,5,1,8,3,7]