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A161615 as a simple table

na(n)
131
243
371
473
589
6107
7139
8179
9211
10223
11241
12269
13271
14281
15293
16311
17317
18337
19379
20383
21389
22419
23443
24449
25467
26503
27563
28569
29587
30607
31647
32653
33727
34739
35743
36757
37761
38811
39839
40857
41863
42881
43941
44967
45977
46991
471019
481021
491049
501061
511069
521087

[31,43,71,73,89,107,139,179,211,223,241,269,271,
 281,293,311,317,337,379,383,389,419,443,449,467,
 503,563,569,587,607,647,653,727,739,743,757,761,
 811,839,857,863,881,941,967,977,991,1019,1021,
 1049,1061,1069,1087]