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A066980 as a simple table

na(n)
15
27
313
415
518
623
725
828
932
1033
1135
1238
1343
1445
1547
1650
1753
1855
1960
2063
2167
2268
2373
2477
2578
2683
2785
2888
2995
3098
31105
32108
33110
34113
35115
36117
37123
38127
39128
40130
41133
42137
43138
44140
45143
46145
47150
48153
49155
50158
51162
52163
53165
54168
55172
56173
57175
58176
59178
60182

[5,7,13,15,18,23,25,28,32,33,35,38,43,45,47,50,53,
 55,60,63,67,68,73,77,78,83,85,88,95,98,105,108,
 110,113,115,117,123,127,128,130,133,137,138,140,
 143,145,150,153,155,158,162,163,165,168,172,173,
 175,176,178,182]