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A083909 as a simple table

na(n)
19
2990
399900
49999000
5999990000
699999900000
79999999000000
8999999990000000
999999999900000000
109999999999000000000
11999999999990000000000
1299999999999900000000000
139999999999999000000000000
14999999999999990000000000000
1599999999999999900000000000000

[9,990,99900,9999000,999990000,99999900000,
 9999999000000,999999990000000,99999999900000000,
 9999999999000000000,999999999990000000000,
 99999999999900000000000,9999999999999000000000000,
 999999999999990000000000000,
 99999999999999900000000000000]