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A257671 as a simple table

na(n)
12
23
34
45
56
67
78
89
911
1012
1113
1217
1318
1419
1520
1622
1724
1829
1930
2031
2135
2246
2347
2448
2549
2651
2753
2858
2964
3076
3177
3278
3382
3493
35122
36123
37124
38125
39127
40129
41134
42140
43152
44169
45199
46200
47201
48205
49216
50245
51321
52322
53323
54324
55326
56328
57333
58339
59351
60368

[2,3,4,5,6,7,8,9,11,12,13,17,18,19,20,22,24,29,30,
 31,35,46,47,48,49,51,53,58,64,76,77,78,82,93,122,
 123,124,125,127,129,134,140,152,169,199,200,201,
 205,216,245,321,322,323,324,326,328,333,339,351,
 368]