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A028905 as a simple table

na(n)
12
23
35
47
511
613
717
819
923
1029
1113
1237
1314
1434
1547
1635
1759
1816
1967
2017
2137
2279
2338
2489
2579
2611
2713
2817
2919
30113
31127
32113
33137
34139
35149
36115
37157
38136
39167
40137
41179
42118
43119
44139
45179
46199
47112
48223
49227
50229
51233
52239
53124
54125
55257
56236
57269

[2,3,5,7,11,13,17,19,23,29,13,37,14,34,47,35,59,
 16,67,17,37,79,38,89,79,11,13,17,19,113,127,113,
 137,139,149,115,157,136,167,137,179,118,119,139,
 179,199,112,223,227,229,233,239,124,125,257,236,
 269]