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A028799 as a simple table

na(n)
12
23
35
47
58
612
718
819
920
1022
1126
1227
1328
1429
1530
1632
1733
1834
1937
2039
2142
2245
2346
2448
2550
2651
2755
2861
2962
3063
3165
3269
3370
3471
3572
3673
3775
3876
3977
4080
4182
4285

[2,3,5,7,8,12,18,19,20,22,26,27,28,29,30,32,33,34,
 37,39,42,45,46,48,50,51,55,61,62,63,65,69,70,71,
 72,73,75,76,77,80,82,85]