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A156013 as a simple table

na(n)
12
25
313
417
553
673
797
8127
9173
10193
11223
12227
13283
14337
15487
16503
17557
18643
19647
20743
21797
22827
23887
24997
251033
261187
271193
281237
291483
301553
311583
321613
331663
341693
352027
362143
372203
382273
392297
402437
412467
422617
432777
442833
452843
462857
473163
483167
493343

[2,5,13,17,53,73,97,127,173,193,223,227,283,337,
 487,503,557,643,647,743,797,827,887,997,1033,1187,
 1193,1237,1483,1553,1583,1613,1663,1693,2027,2143,
 2203,2273,2297,2437,2467,2617,2777,2833,2843,2857,
 3163,3167,3343]