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A002283 as a simple table

na(n)
00
19
299
3999
49999
599999
6999999
79999999
899999999
9999999999
109999999999
1199999999999
12999999999999
139999999999999
1499999999999999
15999999999999999
169999999999999999
1799999999999999999
18999999999999999999
199999999999999999999
2099999999999999999999
21999999999999999999999
229999999999999999999999

[0,9,99,999,9999,99999,999999,9999999,99999999,
 999999999,9999999999,99999999999,999999999999,
 9999999999999,99999999999999,999999999999999,
 9999999999999999,99999999999999999,
 999999999999999999,9999999999999999999,
 99999999999999999999,999999999999999999999,
 9999999999999999999999]