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A117840 as a simple table

na(n)
179
2101
3103
4107
5151
6163
7179
8197
9211
10229
11251
12271
13281
14293
15349
16379
17401
18419
19443
20491
21503
22509
23521
24523
25541
26563
27577
28599
29601
30613
31631
32653
33691
34701
35769
36821
37853
38857
39881
40997
411009
421013
431019
441021
451031
461033
471039
481049
491051
501061

[79,101,103,107,151,163,179,197,211,229,251,271,
 281,293,349,379,401,419,443,491,503,509,521,523,
 541,563,577,599,601,613,631,653,691,701,769,821,
 853,857,881,997,1009,1013,1019,1021,1031,1033,
 1039,1049,1051,1061]