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A368187 as a simple table

na(n)
12
29
321
425
549
657
7115
8121
9133
10159
11195
12289
13361
14371
15393
16455
17507
18515
19529
20555
21845
22897
23915
24917
25933
26957
27961
281007
291067
301183
311235
321295
331335
341443
351681
362093
372095
382135
392157
402177
412193
422197
432233
442265
452343
462369
472379
482405
492489

[2,9,21,25,49,57,115,121,133,159,195,289,361,371,
 393,455,507,515,529,555,845,897,915,917,933,957,
 961,1007,1067,1183,1235,1295,1335,1443,1681,2093,
 2095,2135,2157,2177,2193,2197,2233,2265,2343,2369,
 2379,2405,2489]