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A001369 as a simple table

na(n)
11
223
3456
47891
51234
6567891
7123456
878910123
9456789101
102345678910
1112345678910
12123456789101
132345678910123
1445678910123456
15789101234567891
16123456789101234
1756789101234567891
1812345678910123456
197891012345678910123
2045678910123456789101

[1,23,456,7891,1234,567891,123456,78910123,
 456789101,2345678910,12345678910,123456789101,
 2345678910123,45678910123456,789101234567891,
 123456789101234,56789101234567891,
 12345678910123456,7891012345678910123,
 45678910123456789101]