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A368902 as a simple table

na(n)
12
23
34
45
56
67
78
89
910
1011
1113
1217
1318
1419
1521
1622
1723
1824
1925
2026
2127
2229
2330
2431
2532
2633
2734
2836
2937
3038
3140
3241
3342
3443
3545
3647
3748
3849
3953
4056
4157
4258
4359
4460
4561
4662
4763
4864
4966
5067
5169
5270
5371
5472
5573
5674
5775
5878
5979
6080
6182
6283
6384
6485
6588
6689
6790
6893
6996
7097
7198
72100
73101
74102
75103
76104
77105
78106
79107

[2,3,4,5,6,7,8,9,10,11,13,17,18,19,21,22,23,24,25,
 26,27,29,30,31,32,33,34,36,37,38,40,41,42,43,45,
 47,48,49,53,56,57,58,59,60,61,62,63,64,66,67,69,
 70,71,72,73,74,75,78,79,80,82,83,84,85,88,89,90,
 93,96,97,98,100,101,102,103,104,105,106,107]