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A120960 as a simple table

na(n)
15
213
317
425
529
637
741
853
961
1073
1189
1297
13101
14109
15113
16125
17137
18149
19157
20169
21173
22181
23193
24197
25229
26233
27241
28257
29269
30277
31281
32289
33293
34313
35317
36337
37349
38353
39373
40389
41397
42401
43409
44421
45433
46449
47457
48461
49509
50521
51541
52557
53569
54577
55593

[5,13,17,25,29,37,41,53,61,73,89,97,101,109,113,
 125,137,149,157,169,173,181,193,197,229,233,241,
 257,269,277,281,289,293,313,317,337,349,353,373,
 389,397,401,409,421,433,449,457,461,509,521,541,
 557,569,577,593]