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A019404 as a simple table

na(n)
15
27
317
447
559
671
779
889
997
10107
11131
12137
13151
14163
15167
16173
17193
18197
19233
20239
21251
22257
23263
24281
25283
26307
27311
28349
29373
30379
31383
32389
33419
34439
35443
36457
37461
38467
39479
40491
41503
42521
43523
44577
45601
46619
47641
48673
49677
50701
51719
52733
53739
54751
55787
56797

[5,7,17,47,59,71,79,89,97,107,131,137,151,163,167,
 173,193,197,233,239,251,257,263,281,283,307,311,
 349,373,379,383,389,419,439,443,457,461,467,479,
 491,503,521,523,577,601,619,641,673,677,701,719,
 733,739,751,787,797]