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A107912 as a simple table

na(n)
12
23
34
45
57
68
710
811
914
1015
1116
1217
1319
1421
1522
1623
1726
1827
1929
2031
2132
2233
2334
2435
2538
2639
2741
2844
2945
3046
3147
3250
3351
3452
3553
3655
3757
3858
3959
4062
4163
4264
4365
4468
4569
4671
4774
4875
4976
5077
5179
5282
5383
5485
5586
5687
5789
5891
5992
6093
6194
6295
6398
6499
65101
66103
67105
68106
69107

[2,3,4,5,7,8,10,11,14,15,16,17,19,21,22,23,26,27,
 29,31,32,33,34,35,38,39,41,44,45,46,47,50,51,52,
 53,55,57,58,59,62,63,64,65,68,69,71,74,75,76,77,
 79,82,83,85,86,87,89,91,92,93,94,95,98,99,101,103,
 105,106,107]