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A060863 as a simple table

na(n)
12
23
34
45
56
67
79
811
912
1013
1115
1217
1318
1419
1521
1622
1723
1826
1929
2030
2131
2234
2337
2438
2539
2641
2742
2843
2945
3046
3147
3249
3350
3451
3552
3653
3755
3856
3959
4060
4161
4264
4367
4468
4569
4670
4771
4872
4973
5076
5177
5278
5379
5481
5582
5683
5786
5887
5989
6091
6192
6293
6395
6496
6597
6699
67100
68101
69102
70103

[2,3,4,5,6,7,9,11,12,13,15,17,18,19,21,22,23,26,
 29,30,31,34,37,38,39,41,42,43,45,46,47,49,50,51,
 52,53,55,56,59,60,61,64,67,68,69,70,71,72,73,76,
 77,78,79,81,82,83,86,87,89,91,92,93,95,96,97,99,
 100,101,102,103]