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A248474 as a simple table

na(n)
113
217
343
447
573
677
7103
8107
9133
10137
11163
12167
13193
14197
15223
16227
17253
18257
19283
20287
21313
22317
23343
24347
25373
26377
27403
28407
29433
30437
31463
32467
33493
34497
35523
36527
37553
38557
39583
40587
41613
42617
43643
44647
45673
46677
47703
48707
49733
50737
51763
52767
53793
54797

[13,17,43,47,73,77,103,107,133,137,163,167,193,
 197,223,227,253,257,283,287,313,317,343,347,373,
 377,403,407,433,437,463,467,493,497,523,527,553,
 557,583,587,613,617,643,647,673,677,703,707,733,
 737,763,767,793,797]