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A156271 as a simple table

na(n)
12
23
35
47
58
69
711
812
914
1015
1116
1218
1320
1421
1523
1624
1725
1827
1929
2030
2132
2234
2335
2436
2538
2639
2741
2843
2944
3046
3148
3249
3350
3452
3553
3655
3757
3858
3959
4061
4162
4263
4365
4466
4567
4669
4771
4872
4974
5075
5177
5279
5380
5481
5583
5685
5786
5888
5989
6090
6192
6293
6395
6496
6597
6699
67100
68102
69104
70105

[2,3,5,7,8,9,11,12,14,15,16,18,20,21,23,24,25,27,
 29,30,32,34,35,36,38,39,41,43,44,46,48,49,50,52,
 53,55,57,58,59,61,62,63,65,66,67,69,71,72,74,75,
 77,79,80,81,83,85,86,88,89,90,92,93,95,96,97,99,
 100,102,104,105]