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A235920 as a simple table

na(n)
117
231
341
443
561
671
783
8103
9109
10173
11181
12211
13271
14349
15353
16541
17661
18673
19743
20811
21911
22953
23971
241171
251429
261471
271483
281723
291787
302053
312203
322579
332749
343019
353299
363391
373433
383463
393727
403917
414003
424021
434049
444243
454447
464567
474657
484729
494801
504993

[17,31,41,43,61,71,83,103,109,173,181,211,271,349,
 353,541,661,673,743,811,911,953,971,1171,1429,
 1471,1483,1723,1787,2053,2203,2579,2749,3019,3299,
 3391,3433,3463,3727,3917,4003,4021,4049,4243,4447,
 4567,4657,4729,4801,4993]