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A093299 as a simple table

na(n)
10
299
3990
49900990
599990
699990099990
79999990
8999999009999990
9999999990
109999999900999999990
1199999999990
1299999999990099999999990
139999999999990

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