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A244602
as a simple table
n
a(n)
1
7
2
66
3
999
4
8888
5
66666
6
0
7
5555555
8
99999999
9
111111111
10
1111111111
[7,66,999,8888,66666,0,5555555,99999999,111111111, 1111111111]