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A001310 as a simple table

na(n)
01
11
22
32
44
54
66
76
89
99
1013
1113
1218
1318
1424
1524
1631
1731
1839
1939
2050
2150
2262
2362
2477
2577
2693
2793
28112
29112
30134
31134
32159
33159
34187
35187
36218
37218
38252
39252
40293
41293
42337
43337
44388
45388
46442
47442
48503
49503
50571
51571
52646
53646
54728
55728
56817
57817
58913

[1,1,2,2,4,4,6,6,9,9,13,13,18,18,24,24,31,31,39,
 39,50,50,62,62,77,77,93,93,112,112,134,134,159,
 159,187,187,218,218,252,252,293,293,337,337,388,
 388,442,442,503,503,571,571,646,646,728,728,817,
 817,913]