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A203555 as a simple table

na(n)
12
22
34
44
55
619
719
819
919
1019
1119
1219
1319
1419
1519
1619
1719
1819
1919
2020
2121
2243
2343
2443
2543
2643
2743
2843
2943
3043
3143
3243
3343
3443
3543
3643
3743
3843
3943
4043
4143
4243
4343
4445
4545
4646
4747
4868
4968
5068
5168
5268
5368
5468
5568
5668
5768
5868
5968
6068
6168
6268
6368
6468
6568
6668

[2,2,4,4,5,19,19,19,19,19,19,19,19,19,19,19,19,19,
 19,20,21,43,43,43,43,43,43,43,43,43,43,43,43,43,
 43,43,43,43,43,43,43,43,43,45,45,46,47,68,68,68,
 68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68]