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A215809 as a simple table

na(n)
13
27
313
419
531
637
743
861
967
1073
1179
12127
13163
14199
15223
16307
17313
18349
19397
20433
21523
22541
23613
24619
25709
26823
27907
281087
291123
301129
311213
321279
331531

[3,7,13,19,31,37,43,61,67,73,79,127,163,199,223,
 307,313,349,397,433,523,541,613,619,709,823,907,
 1087,1123,1129,1213,1279,1531]