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A339963 as a simple table

na(n)
121
233
345
457
569
685
793
8105
9117
10129
11133
12141
13145
14153
15165
16177
17201
18205
19213
20217
21237
22249
23253
24261
25265
26273
27285
28297
29301
30309
31321
32325
33333
34345
35357
36369
37381
38385
39393
40405
41417
42429
43445
44453
45465
46469
47477
48481
49489
50493
51501
52505
53513
54517
55525
56537
57549
58553
59561
60565
61573
62585
63597
64621

[21,33,45,57,69,85,93,105,117,129,133,141,145,153,
 165,177,201,205,213,217,237,249,253,261,265,273,
 285,297,301,309,321,325,333,345,357,369,381,385,
 393,405,417,429,445,453,465,469,477,481,489,493,
 501,505,513,517,525,537,549,553,561,565,573,585,
 597,621]