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A063934 as a simple table

na(n)
12
23
34
45
56
67
79
811
912
1013
1115
1217
1318
1419
1521
1623
1726
1829
1930
2031
2134
2237
2339
2441
2542
2643
2745
2847
2950
3053
3156
3259
3360
3461
3564
3667
3769
3871
3972
4073
4176
4279
4381
4483
4586
4689
4793
4897
4999
50101
51102
52103
53105
54107
55108
56109
57111
58113
59120
60127
61129
62131
63134
64137
65138

[2,3,4,5,6,7,9,11,12,13,15,17,18,19,21,23,26,29,
 30,31,34,37,39,41,42,43,45,47,50,53,56,59,60,61,
 64,67,69,71,72,73,76,79,81,83,86,89,93,97,99,101,
 102,103,105,107,108,109,111,113,120,127,129,131,
 134,137,138]