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A093945
as a simple table
n
a(n)
1
499
2
4999
3
49999
4
4999999
5
499999999999999
6
4999999999999999999999999999999999999999999999999999999
[499,4999,49999,4999999,499999999999999, 49999999999999999999999999999999999999999999999999\ 99999]