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A374841 as a simple table

na(n)
13
27
319
443
573
6127
7163
8337
9341
10379
11487
12601
13881
14883
15937
161387
171459
181801
192593
202647
212857
223079
233529
243673
253943
264057
274201
284681
295419
305461
315881
326121
336481
346529
356553
366571
376841
387481
397993
408233
418911
429001
439199
449241
459721
4610261
4710657
4811161
4911827
5012241

[3,7,19,43,73,127,163,337,341,379,487,601,881,883,
 937,1387,1459,1801,2593,2647,2857,3079,3529,3673,
 3943,4057,4201,4681,5419,5461,5881,6121,6481,6529,
 6553,6571,6841,7481,7993,8233,8911,9001,9199,9241,
 9721,10261,10657,11161,11827,12241]