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A068406 as a simple table

na(n)
12
23
34
45
58
69
710
811
913
1022
1123
1228
1329
1434
1538
1641
1745
1846
1953
2055
2157
2258
2372
2476
2577
2680
2781
2883
2985
3087
3188
3289
3391
3492
3593
3694
37100
38104
39106
40108
41112
42113
43117
44118
45121
46122
47123
48124
49125
50128
51129
52131
53133
54143
55145
56147
57148
58152
59159
60160
61161
62162

[2,3,4,5,8,9,10,11,13,22,23,28,29,34,38,41,45,46,
 53,55,57,58,72,76,77,80,81,83,85,87,88,89,91,92,
 93,94,100,104,106,108,112,113,117,118,121,122,123,
 124,125,128,129,131,133,143,145,147,148,152,159,
 160,161,162]