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A245906 as a simple table

na(n)
15
213
317
433
537
661
765
897
9101
10141
11145
12193
13197
14253
15257
16321
17325
18397
19401
20481
21485
22573
23577
24673
25677
26781
27785
28897
29901
301021
311025
321153
331157
341293
351297
361441
371445
381597
391601
401761
411765
421933
431937
442113
452117
462301
472305
482497
492501
502701

[5,13,17,33,37,61,65,97,101,141,145,193,197,253,
 257,321,325,397,401,481,485,573,577,673,677,781,
 785,897,901,1021,1025,1153,1157,1293,1297,1441,
 1445,1597,1601,1761,1765,1933,1937,2113,2117,2301,
 2305,2497,2501,2701]