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A031979 as a simple table

na(n)
111
213
317
419
520
623
729
830
931
1032
1137
1247
1350
1459
1567
1670
1771
1873
1974
2076
2179
2289
2391
2492
2595
2697
2798
28102
29103
30105
31107
32111
33113
34117
35119
36120
37123
38127
39129
40130
41131
42132
43133
44137
45139
46147
47149
48150
49157
50159
51167
52169
53170
54171
55172
56173
57174
58175

[11,13,17,19,20,23,29,30,31,32,37,47,50,59,67,70,
 71,73,74,76,79,89,91,92,95,97,98,102,103,105,107,
 111,113,117,119,120,123,127,129,130,131,132,133,
 137,139,147,149,150,157,159,167,169,170,171,172,
 173,174,175]