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A116892 as a simple table

na(n)
12
27
347
479
5103
6127
7191
8199
9263
10367
11383
12431
13479
14503
15599
16607
17631
18727
19743
20823
21839
22863
23887
24991
251087
261151
271319
281367
291423
301487
311511
321583
331663
341783
351823
361871
371951
382039
392063
402111
412143
422287
432311
442383
452423
462447
472503
482551

[2,7,47,79,103,127,191,199,263,367,383,431,479,
 503,599,607,631,727,743,823,839,863,887,991,1087,
 1151,1319,1367,1423,1487,1511,1583,1663,1783,1823,
 1871,1951,2039,2063,2111,2143,2287,2311,2383,2423,
 2447,2503,2551]