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A288632 as a simple table

na(n)
15
27
313
419
537
667
789
8109
9127
10307
11379
12389
13449
14487
15499
16683
17719
18769
19877
20929
21937
221009
231163
241297
251523
261559
271567
281831
291933
301979
312153
322213
332221
342269
352389
362459
372659
382803
392857
402909
413037
423089

[5,7,13,19,37,67,89,109,127,307,379,389,449,487,
 499,683,719,769,877,929,937,1009,1163,1297,1523,
 1559,1567,1831,1933,1979,2153,2213,2221,2269,2389,
 2459,2659,2803,2857,2909,3037,3089]