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A279392 as a simple table

na(n)
113
217
341
453
589
697
7109
8149
9157
10229
11233
12257
13281
14313
15317
16337
17353
18373
19397
20401
21421
22433
23457
24461
25557
26569
27577
28601
29641
30709
31733
32769
33797
34809

[13,17,41,53,89,97,109,149,157,229,233,257,281,
 313,317,337,353,373,397,401,421,433,457,461,557,
 569,577,601,641,709,733,769,797,809]