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A093299 as a simple table

n a(n)
1 0
2 99
3 990
4 9900990
5 99990
6 99990099990
7 9999990
8 999999009999990
9 999999990
10 9999999900999999990
11 99999999990
12 99999999990099999999990
13 9999999999990

[0,99,990,9900990,99990,99990099990,9999990,
 999999009999990,999999990,9999999900999999990,
 99999999990,99999999990099999999990,9999999999990]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)