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A354921 as a simple table

na(n)
12
23
34
45
57
68
79
811
912
1013
1116
1217
1319
1421
1523
1625
1727
1828
1929
2030
2131
2232
2335
2437
2539
2640
2741
2843
2944
3047
3148
3249
3353
3455
3556
3657
3759
3860
3961
4064
4166
4267
4371
4473
4575
4676
4779
4880
4981
5083
5185
5289
5390
5492
5593
5697
5799
58101
59102
60103
61104
62105
63107
64108
65109
66111
67113
68117
69119
70120
71121
72124
73125
74126
75127
76128

[2,3,4,5,7,8,9,11,12,13,16,17,19,21,23,25,27,28,
 29,30,31,32,35,37,39,40,41,43,44,47,48,49,53,55,
 56,57,59,60,61,64,66,67,71,73,75,76,79,80,81,83,
 85,89,90,92,93,97,99,101,102,103,104,105,107,108,
 109,111,113,117,119,120,121,124,125,126,127,128]