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A336721 as a simple table

na(n)
12
23
35
47
513
617
719
831
949
1061
1183
1289
13107
14127
15167
16179
17197
18233
19241
20269
21281
22347
23373
24421
25443
26457
27487
28521
29607
30697
31769
32829
33881
341049
351063

[2,3,5,7,13,17,19,31,49,61,83,89,107,127,167,179,
 197,233,241,269,281,347,373,421,443,457,487,521,
 607,697,769,829,881,1049,1063]