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A156112 as a simple table

na(n)
17
211
317
431
537
667
7101
8127
9157
10191
11197
12241
13277
14281
15311
16317
17337
18347
19431
20521
21541
22571
23647
24751
25787
26911
27941
28947
29977
30997
311051
321151
331187
341451
351487
361621
371627
381877
392017
402027
412237
422311
432467
442521
452621
462647
472657
482677
492731

[7,11,17,31,37,67,101,127,157,191,197,241,277,281,
 311,317,337,347,431,521,541,571,647,751,787,911,
 941,947,977,997,1051,1151,1187,1451,1487,1621,
 1627,1877,2017,2027,2237,2311,2467,2521,2621,2647,
 2657,2677,2731]