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A139316 as a simple table

na(n)
12
23
34
45
57
611
713
815
917
1019
1121
1223
1327
1428
1529
1631
1733
1835
1937
2039
2141
2242
2343
2447
2548
2651
2752
2853
2955
3057
3159
3261
3365
3467
3569
3671
3772
3873
3976
4077
4178
4279
4383
4484
4585
4687
4789
4891
4993
5095
5197
5298
53101
54103
55105
56107
57108
58109
59110
60111
61113
62114
63115
64119
65120
66123

[2,3,4,5,7,11,13,15,17,19,21,23,27,28,29,31,33,35,
 37,39,41,42,43,47,48,51,52,53,55,57,59,61,65,67,
 69,71,72,73,76,77,78,79,83,84,85,87,89,91,93,95,
 97,98,101,103,105,107,108,109,110,111,113,114,115,
 119,120,123]