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A171028 as a simple table

na(n)
12
23
35
47
511
613
717
819
923
1029
1131
1237
1341
1443
1547
1653
1759
181
197
2071
2173
2279
2383
2489
2597
26161
27163
28167
29169
30113
31127
32131
33137
34139
35149
36151
37157
38103
39107
40173
41179
42181
43191
44193
45197
46199
47211
48223
49227
50229
51233
52239
53241
54251
55257
56203
57209

[2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,1,
 7,71,73,79,83,89,97,161,163,167,169,113,127,131,
 137,139,149,151,157,103,107,173,179,181,191,193,
 197,199,211,223,227,229,233,239,241,251,257,203,
 209]