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A108181 as a simple table

na(n)
19
221
325
433
549
657
765
869
977
1085
1193
12121
13129
14133
15141
16145
17161
18169
19177
20185
21201
22205
23209
24213
25217
26221
27237
28249
29253
30265
31289
32301
33305
34309
35321
36329
37341
38361
39365
40377
41381
42393
43413
44417
45437
46445
47453
48469
49473
50481
51485
52489
53493
54497

[9,21,25,33,49,57,65,69,77,85,93,121,129,133,141,
 145,161,169,177,185,201,205,209,213,217,221,237,
 249,253,265,289,301,305,309,321,329,341,361,365,
 377,381,393,413,417,437,445,453,469,473,481,485,
 489,493,497]