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A176181 as a simple table

na(n)
113
231
337
461
573
689
797
8109
9113
10151
11157
12181
13193
14199
15211
16229
17241
18271
19277
20313
21331
22349
23367
24373
25389
26397
27401
28421
29433
30449
31457
32523
33541
34571
35601
36607
37613
38619
39631
40661
41673
42691
43701
44727
45733
46751
47757
48761
49769
50811
51853
52877
53929

[13,31,37,61,73,89,97,109,113,151,157,181,193,199,
 211,229,241,271,277,313,331,349,367,373,389,397,
 401,421,433,449,457,523,541,571,601,607,613,619,
 631,661,673,691,701,727,733,751,757,761,769,811,
 853,877,929]