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A109257 as a simple table

na(n)
15
25
37
417
513
629
719
841
953
1031
1167
1279
1343
1489
1597
16109
1761
18127
19137
2073
21149
22163
23173
24181
25197
26103
27211
28109
29223
30229
31257
32269
33139
34281
35151
36307
37317
38331
39337
40349
41181
42367
43193
44389
45199
46401
47433
48449
49233
50461
51479
52241
53487
54509
55521
56557

[5,5,7,17,13,29,19,41,53,31,67,79,43,89,97,109,61,
 127,137,73,149,163,173,181,197,103,211,109,223,
 229,257,269,139,281,151,307,317,331,337,349,181,
 367,193,389,199,401,433,449,233,461,479,241,487,
 509,521,557]