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A028791 as a simple table

na(n)
12
25
36
47
58
611
714
815
917
1018
1119
1220
1321
1423
1524
1626
1728
1829
1931
2032
2133
2234
2335
2437
2538
2641
2744
2845
2946
3047
3150
3253
3354
3456
3557
3658
3759
3860
3962
4063
4165
4267
4368
4470
4571
4672
4773
4874
4976
5077

[2,5,6,7,8,11,14,15,17,18,19,20,21,23,24,26,28,29,
 31,32,33,34,35,37,38,41,44,45,46,47,50,53,54,56,
 57,58,59,60,62,63,65,67,68,70,71,72,73,74,76,77]