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A234257 as a simple table

na(n)
14
25
37
49
515
620
721
831
939
1045
1163
1269
1375
14103
15111
16139
17151
18159
19165
20175
21195
22199
23201
24213
25231
26243
27259
28279
29283
30285
31315
32319
33333
34339
35349
36351
37355
38369
39375
40381
41399
42403
43411
44423
45459
46463
47465
48489
49501
50511
51525
52543
53549
54565
55579

[4,5,7,9,15,20,21,31,39,45,63,69,75,103,111,139,
 151,159,165,175,195,199,201,213,231,243,259,279,
 283,285,315,319,333,339,349,351,355,369,375,381,
 399,403,411,423,459,463,465,489,501,511,525,543,
 549,565,579]