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A217926 as a simple table

na(n)
17
217
329
429
541
641
759
859
971
1097
1197
1297
13101
14101
15101
16137
17137
18149
19149
20149
21179
22179
23179
24191
25191
26191
27191
28191
29227
30227
31227
32227
33227
34269
35269
36269
37269
38307
39307
40311
41311
42311
43311
44347
45347
46347
47347
48347
49347
50419
51419
52419
53419
54419

[7,17,29,29,41,41,59,59,71,97,97,97,101,101,101,
 137,137,149,149,149,179,179,179,191,191,191,191,
 191,227,227,227,227,227,269,269,269,269,307,307,
 311,311,311,311,347,347,347,347,347,347,419,419,
 419,419,419]