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A160961 as a simple table

na(n)
117
231
341
471
589
697
7109
8113
9127
10197
11239
12251
13349
14379
15433
16461
17631
18829
19881
20911
21919
22953
23967
24991
251151
261231
271427
281429
291471
301693
311759
321847
331871
342143
352269
362273
372393
382399
392437
402531
412591
422617
432633
442647
452729
462851
472953
482969

[17,31,41,71,89,97,109,113,127,197,239,251,349,
 379,433,461,631,829,881,911,919,953,967,991,1151,
 1231,1427,1429,1471,1693,1759,1847,1871,2143,2269,
 2273,2393,2399,2437,2531,2591,2617,2633,2647,2729,
 2851,2953,2969]