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A048374 as a simple table

na(n)
19
231
399
4998
5999
67937
79999
899998
999999
10996999
11999999
126688699
139999999
1497609999
1599969999
16999999998
17999899999
189998999999
199999999999
209999699999
2199999989999
2299998999999
23997999998999

[9,31,99,998,999,7937,9999,99998,99999,996999,
 999999,6688699,9999999,97609999,99969999,
 999999998,999899999,9998999999,9999999999,
 9999699999,99999989999,99998999999,997999998999]