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A214520 as a simple table

na(n)
15
27
323
437
547
653
767
879
983
1089
11113
12127
13131
14157
15163
16167
17173
18211
19223
20251
21257
22263
23277
24293
25307
26317
27331
28337
29359
30367
31373
32379
33383
34389
35397
36401
37409
38449
39457
40467
41479
42487
43491
44499
45503
46509
47541
48547
49557
50563
51577
52587
53593
54613
55631

[5,7,23,37,47,53,67,79,83,89,113,127,131,157,163,
 167,173,211,223,251,257,263,277,293,307,317,331,
 337,359,367,373,379,383,389,397,401,409,449,457,
 467,479,487,491,499,503,509,541,547,557,563,577,
 587,593,613,631]