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A392750 as a simple table

na(n)
12
23
34
45
56
67
78
89
910
1011
1113
1215
1316
1418
1519
1620
1721
1822
1923
2024
2125
2227
2329
2431
2532
2634
2736
2837
2939
3040
3141
3242
3343
3444
3545
3647
3748
3851
3952
4053
4154
4255
4357
4458
4559
4660
4761
4862
4963
5064
5165
5266
5367
5469
5570
5671
5772
5873
5975
6076
6177
6278
6379
6480
6581
6682
6783
6884
6987
7088
7189
7290
7391
7494
7595
7697
7799

[2,3,4,5,6,7,8,9,10,11,13,15,16,18,19,20,21,22,23,
 24,25,27,29,31,32,34,36,37,39,40,41,42,43,44,45,
 47,48,51,52,53,54,55,57,58,59,60,61,62,63,64,65,
 66,67,69,70,71,72,73,75,76,77,78,79,80,81,82,83,
 84,87,88,89,90,91,94,95,97,99]